Problem with multi ccsprite on tilemap of cocos2d-x

I have a problem when i am coding a game using cocos2d-x library.
I use 1 iso metric tilemap, on that i add 2 (or more) ccsprite. But sometime, the transparent part of a ccsprite ovelaps (hide) another ccprite.
Now, i am thinking about it. May be i missing understand some concept of rendering CCSprite object in cocos2d-x? please.


1.bmp.zip (68.1 KB)