Do portals create duplicate cards?

I was wondering if portals of rem with cards duplicate cards in the portal destination or at least affect the clustering in the queue.
Also, I’ve got my entire folder for my last semester tagged with the suspend cards powerup and had a few rem from there that I found useful & portalled to my current semester subjects.
Is there a way to have those rem/ cards show up in my queue (under my current semester documents), other than just discarding the portal & copy-pasting the rems?