Cut and pasted some music, can't find the rest of my score

I was working on a score that had several text frames and 32 bars of yet-unused staff (empty measures). I cut and pasted 25 measures from a different score to the beginning of these empty measures, did a little formatting, added key signature, etc. But the rest of my score is no longer there. No empty measures appear after the section break at the end of the piece I cut and pasted. If I try to add (append) measures, they don't appear anywhere either. I don't have any more pages after the piece ends. If I try to add a frame after the music, it appears about an inch and half down the page from the end of the music for no apparent reason. Did I do something in the cut and paste procedure that I shouldn't? Doesn't it typically just move the musical material into the existing empty measures?