Adding notes to one staff changes the other notes on the other staffs
Here I have a snare part, below it I have three choir parts. Alto, bass, and tenor. When I start adding notes to the snare, It starts to change the notes in all the other parts. For example, I have on all the choir parts, there are 3 quarter notes in a row. On the snare part I'm trying to add eighth notes. When I start adding the eighth notes in, It changes the quarter notes into dotted quarter notes.