I have just started experimenting with MuseScore. Nothing serious but it is proving to be a useful tool to explore and understand music. I was entering some string parts and hit this odd problem. I had entered the cello part and wanted to copy it to the double bass. So, I tried copy and paste. It worked but the effect was not what I wanted. It moved the notes up an octave so that the bass would play the same notes as the cello. Of course, what I wanted was that it would be notated the same and hence the bass would play an octave below. Is there a technique for this?
I can see the logic in what it did. If I were to copy an oboe part to the clarinet then I would appreciate the transposition. (I have not tried that yet.)