While creating a new table from DB Structure page, it starts to appear in 'Recent' tables list before its actually created.
1) Click on any database name from Navi panel.
2) Enter table in "Create table" section at bottom and click 'Go'.
Now you arrive at actual Table create page and up to now the table isn't really created and it starts to appear in 'Recent' tables list and it persists even if you discard the table by clicking on any other link.
Also, these entries (both Favorites and Recent) persists in a normal scenario even if you 'DROP' that table.