FFVI: Divergent Paths

Hey, made it really far into the beta so I wanted to ask - Which events should I avoid triggering for now?    I'm assuming the dialog where you reach the Ancient Castle for the first time (supposed to have something between Leo and Terra) and the Earth Dragon battle in the Opera House (since I can't seem to recruit the 16th character yet).  Is that all?  What about the dialog that occurs before you land on Kefka's Tower for the first time?  Assuming that I would end up missing anything new once the beta gets patched.  Otherwise, please disregard.  Also, the Mog sprite issue has been coming and going ever since I first recruited him.  It seems that when I put him in as a leader when editing teams on both airships is when it happens the most frequently.  I can provide save states if asked.