Problem with deleting more than 2 cards
This problem can happen in KanBo 2.2. If you want to delete more than two cards in current browser session, then there is no way to delete following cards. As a workaround, you have to close the current browser tab and load the site again, then it works for the next two cards. This situation is with all browser (IE, Chrome, Firefox) valid.
This was a simple lagging issue connected to number of VM resources. It is fixed by now.