I have a very simple alternate ending. I have a one bar intro, followed by a 32 bar chorus (bars 2-33) and this repeats 3 times. However on the 3rd repeat I do not want bar 33 to play.

How do I accomplish this?

Also for some reason after inserting bar 33 the volume drops noticeably just for this bar and I can figure out why? I didn't change any settings, just added a bar.