Logic Pro 8 split regions track disappears

New to digital recording so bear with me. I need to change an arrangement. I'm trying to lengthen a part without having to rerecord it. I split to region (at bar 29) again at 30. When I split it at thirty the section between 29 and 30 disappears. Whats up? I did it with another track and no problem. What I do again to clarify is split at 29, split and 30. move the section at 30 up to 31, cut from 29 to 30 and paste (29 to 30) at 30.,,, but when I make the second split it disappears.
I'm not clear - can I illustrate?
You have a region titled 'ABC' and when you make your first cut, you get

you then move C away from B:

cut /B/ and place it in the space.

Is that correct?

If so, you should try 'copy' in place of 'cut'

under apple protocols 'cut' removes the source object in all software.


I closed the project, then came back later and tried again and not it is allowing me to do what I want. hummm ???? Thanks guys