I don't have any notifications to be able to test it out, but I don't believe that the skin/theme should matter (but I could be wrong). I typically use the Full - Light theme, and in order to access your Mini Stats, you need to click on your notifications at the top of the page. See if that works for the Classic Skin. If 'Likes' still doesn't show in the Mini Stats for Classic Skin, please let us know. Worst case scenario, until the issue is addressed, you can switch to the Full skin, clear the notification and then switch back.