[Doggiebox] automatic repetition of edits, why?

New (paid-up) user here, having fun. The icons are charming. Something odd: I put in a few bars, then copied & pasted them to have some patterns to play with. Then when I enter a note, it's automagically pasted not only into the bar I'm editing, but the matching bar of the next (repeated) sequence. It's like whatever I do happens in two places at once. Not sure how to de-link them, the original sequence and its copy. I haven't found a reference to this in the Help or the archives. Is it a bug or a feature? Also, is it possible to copy just one voice? I am enjoying the sound files you all have posted. There's talent here!