I realize that this has to be a frustrating issue for people since this is rather frequently reported.
The problem is related to the use of "Favorites" in the board software. Each time this is reported, it becomes necessary to go into the database, locate the offending post IDs, and remove them from the person's "favorite" list.
It takes 5-10 minutes to fix a profile in this way, sometimes longer.
I don't know of any way to fix this permanently.
I don't often look at people's profiles; can people tell me how they use the profiles? If it is really important and there is no workaround, then I can budget more time to fixing this issue. Otherwise, it strikes me as a relatively low priority item, though quite noticeable, that doesn't impact using the board in general.