Without seeing your init code, I'd guess that you may have initialized your board as col/row instead of row/col? If the blank was in a different spot it would probably also show as reversed.  (but 2,2 is 2,2)

(new reply as I misread!)

You would expect when tile==3, that x,y is 1,2 :

0,0 0,1 0,2
1,0 1,1 1,2
2,0 2,1 2,2

Remember, it's row,col so what you are seeing is correct. 

(Your init is doing the right thing).