Two Problems

I have Two Problems

1 - The wall , In the editor has texture but when im playing, it no has texture
2 - Accidental FOF, I didn't make it, and it no haves all the linedef, and it isn't a sector

There is an image from the FOF

For the first problem you have:
Well we need a little more information to help you out. Also what Srb2 DoomBuilder you are using? Cause if you have a older version of Srb2 DoomBuilder some of the textures don't show and it cause's error's when loading the wad to Srb2.

For the second problem you have:
Did you see if it's taged or has a linedef action of 100? That maybe why there is a Accidental FOF.

I can't seem to know why that Accidental FOF shows up. Try to remake the conditions so that we can have more information about your problem.