.:UPDATED POST:.
Okay, two problems here that I've tried to fix but have failed to do so.
The first of which is with a tunnel map that I'm working on as part of a map pack. Everything's fine except for the terrain. I can't seem to change it to the one I want without it going to another texture. I mean, the switch has happened twice, from a dark texture to a lighter stone texture, but it hasn't gone to the one I want. I have two other, IDENTICAL maps, same heightmap and all; they're taking the textures just fine. I don't know why it's being a jerk on this one. :c Fixed this issue on my own; replaced the custom textures with default textures, problem fixed.
The second REAL problem is with destination placement. Now, I think this is more a glitch than anything but I don't know what to do about it. ; ;
I have the coordinates set out in the tunnel map portal to it, and like with the tunnel map, I have two other maps identical to this one. Same size, same heightmap. For some reason, I ALWAYS end up in the corner of the map whenever I enter it from the tunnel, and I'm positive I have the correct coordinates, as well as no CODW portal. I had the problem before and I found the CODW portal, so I got rid of it but that didn't help. :c It doesn't make sense at all! Also, all the maps I'm speaking of in this post are connected through gates, in case I confuse/mislead more people. OTL
If anybody can help with/give advice on this, please do! ;A;