4) I'm having trouble creating album pdfs. I select multiple files in the open dialog but only the first one is processed and only the first files shows up in the "Album.pdf".

Am I Doing something wrong?

no, You are right. It's normal.

If You choose OPEN, the processing session will close PDF after EACH FILE.

So select in Finder all the files You need, and DRAG them to the window: the processing session will join them.
NOTE: the order is decided by the FINDER, so (for now... ) is NOT possible to specify the order in the output PDF.