Well that expains why the transfer case was over full.
Keep, a eye on it for a while may be just a slow leak from traans to transfer case.
Also you have a code 1 on transfer case.
But clear the code and make sure it comes back on with the fuse good. Before replacing anwthing.
Here is a link to the test for code 1.
http://members.troublecodes.net/crunch/code1.pdf
MT-2500