Working FT8 or FT4, you can get a few unconfirmed QSOs. This is hard when some people don't send the 73 at the end and just move on to another QSO. When you filter, and select the field, "QSO Status," it has confirmed and unconfirmed, but it would help to have a "rejected" selection as well. Yes, you do get a notification, but if you don't have time to take care of it (which involves editing the WSJT-X .adi file as well as here on QRZ) it's easy to forget to take care of it. If a person gets four or five over the course of a week, it would be easy to just see them all at one time to mass delete.