The entries with a Discover button are the ones to worry about -- they are likely all ghosts, and that's definitely enough of them to mess up your mesh pretty bad.
This guide is the most comprehensive info on ghost removal -- I'd start here. Since many of yours have a high neighbor count, I don't think there's any good chance you can shed them without using a stick, but I'd defer to other users here who have more ghostbusting experience than I do.
Those 2 LR entries are likely ghosts too, but we so far don't have any known way to deal with LR ghosts. On the plus side, those shouldn't actually hurt anything since they are not in your mesh.
SmartStart (SS) is required to pair LR devices, and is optional to use for pairing non-LR 800-series and 700-series ZW devices. If you use SS, I highly recommend @jtp10181's excellent SS management app.
