Hey sorry about not responding sooner I sometimes forget to log on here.Anyways the problem that is occuring is related to the door animations.It could be that they were not properly inserted right. I set the value of the door to "use warp" instead of "use door/warp" and it worked perfectly fine and the tile glitching didn't happen. So what you could do is either set the behavior bytes of the door tile to "use warp" instead of "use door/warp" or you can download door manager and insert an entire new door yourself.
Here is a link to door manager:
http://filetrip.net/gba-downloads/tools-utilities/download-door-manager-101-f9553.html