I am having a unique intermittent problem I am hoping someone can help me with. I have a large Excel VPA application that has several buttons on the "Config" sheet that execute different VBA scripts. There are also a large number of drop down list boxes. On a fairly regular basis an unusual behavior occurs, when you click on a drop down box one of the buttons (always the same button) magically moves to the drop down box that was clicked. Once this happens the first time, every time you click on a drop down box the button moves to that box. You can close and reopen the file and it will continue to happen. I have not been able to find any way to fix the file once this starts happening. Any ideas on what is causing this and/or what I can do to fix it?

I had been fortunate until today and the master file had never had this problem. Now the master that I do all my development work on has gotten corrupted.