So I've got a weird issue happening. We've got a set of 4 custom buttons on our Sales Orders that are scripted to do different things (make a special PDF, run a related search, etc). The top copy of the 4 buttons all work correctly. In the bottom set of buttons, two of my 4 buttons are causing the same action to fire. As far as I knew, the top buttons and bottom buttons are supposed to be exact duplicates. I certainly haven't programmed them in separately.

I have no idea what to do about this, except to tell people to use the top set only for the time being. Does anyone know what this could be? I'm believing that it's related to 2013.2 since it just cropped up, but it could have been doing this prior to our upgrade and just went unnoticed. It's doing the same thing in different browsers, users, records, etc., so it's not a caching issue of some kind.