Elena,
It would appear that on about 150 or so notes (out of a few thousand)
I chose note card over new note in the first step. Luckily for me I
was careful with the keywords and so it was easy for me to select the
cards that went with the same sources and simply drag them into the
correct source (parent) file. So, I gather from this that note cards
in Scribe are the equivalent to stand alone notes in Zotero? David