Mixed Textures in Map Maker

[PoisonIVy12]

So I started making this map today, and something really weird happened.

So, the terrain and mask came up fine when I started to make the map, and I was able to lay my first texture down well. But when I tried to do texture 2, that's when the weird thing happened. Instead of putting the texture on the second part of my mask, it fused the texture I picked for the second with the first texture. The third one wouldn't show up at all. I honestly have no idea what's wrong with it. I even restarted the game.

So, help? I've never had this issue with Map Maker before.

[PoisonIVy12]

EDIT: I basically redid the map and the textures didn't mix, so I replaced the map with my redo. All fixed, this can be locked now.