UA Tracking Code will not save in box

This is very strange. I have installed the plugin. However, when I went to the Super Admin area to input my UA tracking code number there was one already in there (don't know where it came from). When I change it to the UA number from my account I click "save changes", however when I view the source code the number is not the number I put in...it is the number that was originally there. When I go back into the admin area to look at it, I notice that the number I put in is no longer there.

Any suggestions on how I can fix this problem?