Bug? "PDFs" now shows ALL PDFs, not unsorted PDFs as before
I upgraded iOS to 9.2.1 lately (from 8.x) and iBooks seems to have a bug now (from my perspective):
Originally when I copied a PDF to my iPad (mostly via Dropbox), it would show up under the collection "PDFs", which I would have used as a landing point for my new PDFs which I had not moved to their respective ("sorted") folders yet.
But now after the iOS upgrade, the "PDFs" collection has changed its semantic meaning: It shows *all* PDFs, both new/unsorted *and* those sorted into other folders.
I am not aware if this is intended or a bug (as I view it), but in any case: Is there a way to have a collection/view which shows the unsorted PDFs (as before)?
Thank you!
iPad, iOS 9.2.1