You also have two deleted questions, one deleted by yourself and one closed and then autodeleted. Both got downvotes, and these count for the mechanic that triggers that warning. 

[You can't see your own deleted questions][1] in your profile, but I can link them here if you want (which makes them also visible to some high-level users). 



  [1]: http://meta.stackexchange.com/questions/2645/show-all-of-my-question-answers-to-me-even-if-they-are-deleted