Windows Store Terrain tileOffset Problem

I have a big problem with terrain on Window Store. One of textures of the splat has setted with: size4800.0, 4800.0) offset3300.0, 1400.0)

All appear perfect on editor, but running on builded Windows Store solution (both localmachine and surface remote machine), the texture offeset appear wrong and the log show:

splat 1, size4800.0, 4800.0) offset3300.0, 3300.0)

Something is changing Y offset to the same value of X.

Anyone has a solution/documentation about this issue?

Thanks