Multi-Measure Rests and Note selection

I've had this happen to me too many times, when I go to select a note length (1-9) in the middle of a multi-measure rests, a strange behavior with the measures following the length selection happens. They become shortened (in 4/4) to 7/8, 15/16, 13/16, 3/4, etc. This causes the file to corrupt, but yet, can still be opened, however, this is can't be fixed, for some strange reason. In the attached file, measure 40 of the bassoon part is 7/16 (because I deleted the measures 25-40, and all of the shortened measures got dumped into the last measure, leaving 25-39 perfectly fine). The note I attempted to add was in measure 19 as a resolution to the phrase I was working on. This is also not the first time this error occurred, in fact, this is the 3rd time with this piece alone this happened.

If there's any way to fix this problem, I would like to hear them. Thanks!

(btw, the piece is okay. I saved a backup when the oboe part did the same thing, and somehow recovered...)