More issues with FF6LE

So I was building a new map, same size as the one I was replacing, and before I finished I started getting the "Recompressed tilemaps exceed allotted space. The editor stopped saving at tilemap 0x15D" error. I figured I was placing too many different tiles or something and decided to restore the old map and start again on another map. But when I imported the old map at first it wasn't letting me save the Layer 2 map at all, then when it did I was getting the too large error again. Everything has been restored exactly how it was, but I'm still getting the error. I'm not sure why the old map won't fit back where it went originally. It seems this program is a bit finicky. If anyone can shed some light on that error and maybe what I can do to fix this I would really appreciate it.

I keep a lot of backups so if worse comes to worse I can just go back to an older backup and start over, but I would really like to know how this works so I can be as efficient as possible.

While I'm on the subject of FF6LE, I have also noticed that I can't set my exits to anything above 00FF, anything 01XX gets the 1 trunkated. I have been manually fixing this in the hex, but if there is a fix for it in the program, that would be nice.