diff --git a/cps/constants.py b/cps/constants.py
index 0d43767e..3aca8a56 100644
--- a/cps/constants.py
+++ b/cps/constants.py
@@ -82,7 +82,7 @@ SIDEBAR_RATING          = 1 << 13
 SIDEBAR_FORMAT          = 1 << 14
 SIDEBAR_ARCHIVED        = 1 << 15
 
-ADMIN_USER_ROLES        = sum(r for r in ALL_ROLES.values()) & ~ROLE_EDIT_SHELFS & ~ROLE_ANONYMOUS
+ADMIN_USER_ROLES        = sum(r for r in ALL_ROLES.values()) & ~ROLE_ANONYMOUS
 ADMIN_USER_SIDEBAR      = (SIDEBAR_ARCHIVED << 1) - 1
 
 UPDATE_STABLE       = 0 << 0
diff --git a/cps/editbooks.py b/cps/editbooks.py
index 5bf36139..a26820d3 100644
--- a/cps/editbooks.py
+++ b/cps/editbooks.py
@@ -181,7 +181,7 @@ def delete_book(book_id, book_format):
                 # delete book from Shelfs, Downloads, Read list
                 ub.session.query(ub.BookShelf).filter(ub.BookShelf.book_id == book_id).delete()
                 ub.session.query(ub.ReadBook).filter(ub.ReadBook.book_id == book_id).delete()
-                ub.session.query(ub.ArchivedBook).filter(ub.ReadBook.book_id == book_id).delete()
+                ub.session.query(ub.ArchivedBook).filter(ub.ArchivedBook.book_id == book_id).delete()
                 ub.delete_download(book_id)
                 ub.session.commit()
 
diff --git a/cps/kobo.py b/cps/kobo.py
index 48cb4492..47d0f026 100644
--- a/cps/kobo.py
+++ b/cps/kobo.py
@@ -407,10 +407,8 @@ def HandleTagCreate():
         log.debug("Received malformed v1/library/tags request.")
         abort(400, description="Malformed tags POST request. Data is missing 'Name' or 'Items' field")
 
-    # ToDO: Names are not unique ! -> filter only private shelfs
-    shelf = ub.session.query(ub.Shelf).filter(and_(ub.Shelf.name) == name, ub.Shelf.user_id ==
-                                              current_user.id).one_or_none() # ToDO: shouldn't it ) at the end
-
+    shelf = ub.session.query(ub.Shelf).filter(ub.Shelf.name == name, ub.Shelf.user_id ==
+                                              current_user.id).one_or_none()
     if shelf and not shelf_lib.check_shelf_edit_permissions(shelf):
         abort(401, description="User is unauthaurized to edit shelf.")
 
@@ -428,7 +426,7 @@ def HandleTagCreate():
 
 @kobo.route("/v1/library/tags/<tag_id>", methods=["DELETE", "PUT"])
 def HandleTagUpdate(tag_id):
-    shelf = ub.session.query(ub.Shelf).filter(and_(ub.Shelf.uuid) == tag_id,
+    shelf = ub.session.query(ub.Shelf).filter(ub.Shelf.uuid == tag_id,
                                               ub.Shelf.user_id == current_user.id).one_or_none()
     if not shelf:
         log.debug("Received Kobo tag update request on a collection unknown to CalibreWeb")
@@ -489,7 +487,7 @@ def HandleTagAddItem(tag_id):
         log.debug("Received malformed v1/library/tags/<tag_id>/items/delete request.")
         abort(400, description="Malformed tags POST request. Data is missing 'Items' field")
 
-    shelf = ub.session.query(ub.Shelf).filter(and_(ub.Shelf.uuid) == tag_id,
+    shelf = ub.session.query(ub.Shelf).filter(ub.Shelf.uuid == tag_id,
                                               ub.Shelf.user_id == current_user.id).one_or_none()
     if not shelf:
         log.debug("Received Kobo request on a collection unknown to CalibreWeb")
@@ -500,7 +498,7 @@ def HandleTagAddItem(tag_id):
 
     items_unknown_to_calibre = add_items_to_shelf(items, shelf)
     if items_unknown_to_calibre:
-        log.debug("Received request to add an unknown book to a collecition. Silently ignoring item.")
+        log.debug("Received request to add an unknown book to a collection. Silently ignoring item.")
 
     ub.session.merge(shelf)
     ub.session.commit()
@@ -605,8 +603,7 @@ def create_kobo_tag(shelf):
         book = db.session.query(db.Books).filter(db.Books.id == book_shelf.book_id).one_or_none()
         if not book:
             log.info(u"Book (id: %s) in BookShelf (id: %s) not found in book database",  book_shelf.book_id, shelf.id)
-            # ToDo shouldn't it continue?
-            return None
+            continue
         tag["Items"].append(
             {
                 "RevisionId": book.uuid,
diff --git a/cps/server.py b/cps/server.py
index d2253ab2..14e1d9d2 100755
--- a/cps/server.py
+++ b/cps/server.py
@@ -24,7 +24,7 @@ import signal
 import socket
 
 try:
-    from gevent.pywsgi import WSGIServer
+    from gevent.pywtsgi import WSGIServer
     from gevent.pool import Pool
     from gevent import __version__ as _version
     VERSION = 'Gevent ' + _version
diff --git a/cps/shelf.py b/cps/shelf.py
index 8b9dd999..4d6d5103 100644
--- a/cps/shelf.py
+++ b/cps/shelf.py
@@ -21,6 +21,7 @@
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 from __future__ import division, print_function, unicode_literals
+from datetime import datetime
 
 from flask import Blueprint, request, flash, redirect, url_for
 from flask_babel import gettext as _
@@ -90,6 +91,7 @@ def add_to_shelf(shelf_id, book_id):
         maxOrder = maxOrder[0]
 
     shelf.books.append(ub.BookShelf(shelf=shelf.id, book_id=book_id, order=maxOrder + 1))
+    shelf.last_modified = datetime.utcnow()
     ub.session.merge(shelf)
     ub.session.commit()
     if not xhr:
@@ -141,6 +143,7 @@ def search_to_shelf(shelf_id):
         for book in books_for_shelf:
             maxOrder = maxOrder + 1
             shelf.books.append(ub.BookShelf(shelf=shelf.id, book_id=book, order=maxOrder))
+        shelf.last_modified = datetime.utcnow()
         ub.session.merge(shelf)
         ub.session.commit()
         flash(_(u"Books have been added to shelf: %(sname)s", sname=shelf.name), category="success")
@@ -179,6 +182,7 @@ def remove_from_shelf(shelf_id, book_id):
             return "Book already removed from shelf", 410
 
         ub.session.delete(book_shelf)
+        shelf.last_modified = datetime.utcnow()
         ub.session.commit()
 
         if not xhr:
@@ -269,6 +273,7 @@ def edit_shelf(shelf_id):
 
         if is_shelf_name_unique:
             shelf.name = to_save["title"]
+            shelf.last_modified = datetime.utcnow()
             if "is_public" in to_save:
                 shelf.is_public = 1
             else:
@@ -289,7 +294,7 @@ def delete_shelf_helper(cur_shelf):
     shelf_id = cur_shelf.id
     ub.session.delete(cur_shelf)
     ub.session.query(ub.BookShelf).filter(ub.BookShelf.shelf == shelf_id).delete()
-    ub.session.add(ub.ShelfArchive(uuid=cur_shelf.uuid, user_id=cur_shelf.uuid))
+    ub.session.add(ub.ShelfArchive(uuid=cur_shelf.uuid, user_id=cur_shelf.user_id))
     ub.session.commit()
     log.info("successfully deleted %s", cur_shelf)
 
@@ -342,6 +347,7 @@ def order_shelf(shelf_id):
         for book in books_in_shelf:
             setattr(book, 'order', to_save[str(book.book_id)])
             counter += 1
+            # if order diffrent from before -> shelf.last_modified = datetime.utcnow()
         ub.session.commit()
 
     shelf = ub.session.query(ub.Shelf).filter(ub.Shelf.id == shelf_id).first()
diff --git a/cps/templates/book_edit.html b/cps/templates/book_edit.html
index 754f24e5..f931a60a 100644
--- a/cps/templates/book_edit.html
+++ b/cps/templates/book_edit.html
@@ -213,7 +213,7 @@
         </div>
 
       <div class="modal-footer">
-        <a href="{{ url_for('editbook.delete_book', book_id=book.id) }}" class="btn btn-danger">{{_('Delete')}}</a>
+        <a href="{{ url_for('editbook.delete_book', book_id=book.id) }}" id="delete_confirm" class="btn btn-danger">{{_('Delete')}}</a>
         <button type="button" class="btn btn-default" data-dismiss="modal">{{_('Cancel')}}</button>
       </div>
     </div>
@@ -313,7 +313,7 @@
   });
   function removeIdentifierLine(el) {
     $(el).parent().parent().remove();
-  } 
+  }
 
 </script>
 <script src="{{ url_for('static', filename='js/libs/typeahead.bundle.js') }}"></script>