Cool, i spend a few minutes to fix all of your issues. Let me know if you find others! Normally I would release a new version for crashes, but im hoping to be done with 2.1.0 by end of June, so i think we can wait 2 weeks.
Here is another feature recommended by some guy on Twitter: Mix Paste. It will preserve any existing data where you are pasting.
Here as an example, I copy then move the notes down one octave, then paste the old notes 5 frames to the right. The mix gives some kind of alternating octave.
-Mat