Alright, so I've really been working on the intricacies of smartsort for the past few months. There are two things which you're talking about: Price Accuracy box and Box F. There are always things that don't fit the mold, but this is what I've come to understand:
Price Accuracy will be everything that doesn't have a UPC tied to a DPCI. This is especially true for things that come in packs and the individual items have barcodes. Perrier, for instance, comes in 6 packs. The packaging that keeps the 6 pack together has a UPC tied to a DPCI. The individual bottles, when scanned, will always sort to Price Accuracy because the UPC on the individual bottles aren't tied to the 6 pack DPCI. Anything that the system doesn't know what to do with, it'll pretty much send to PA. Your PA team should be using the "SIM" application (single item markdown) to find similar departments/classes to assign the item a selling price tied to that specific UPC.
Box F. Ahh, the red headed step child of smart sort. Nobody really cares about it. Hell, nobody really knows why it's even there! Officially, that bin is supposed to be the location of anything not on file or not on planogram. A lot of stuff in here will (eventually) become non-carry forward or d-code. You'll get some video games which drop off a POG after a revision, flex merchandise from dept 234 (see spot save) and things of that nature.
When your smartsort isn't setup correctly, you'll also get the "Sort with like items" message, if not PA/box F. I would keep track of what specifically is coming up "Give to PA" because you might be able to figure out a trend or a certain department always going there. It could be something as simple as smart sort not being setup correctly, upc/dpci issue, or something else.
If your PA team isn't taking care of the bin, let the TL know! If they have a busy workload, offer to help work out what you can from the bin. If you can mark down 75% of the items in there, leaving only a few, your TL will be more than willing to come and grab the few things left! It's a great task for a bored SDTM to work on, especially if they love learning new things.