I've had two different things happen to me, which if I am not misunderstanding you, is similar.
I was notified that someone quoted me, but when I went to it, my name was in the reply, but what was said was said by someone else.
I've also had the exact opposite happen. I think that when a poster starts off quote someone, then erases and wants to quotes someone else instead, this happens. No biggie.
Right now my notification thingy says that I have 26 alerts, but when I click on the alert bell, I don't have any. I then click to see them all, but none have been missed. I click the "mark all" thing, it still says that I have 26. This seems to change daily, ha ha. It was perplexing when it started. Now, I just ignore it.