Issue: Mention notifications

Not a big deal but I noticed more than once now that the mention notices sometimes show up late. I just got one now for a mention that was back on the 31st. The mention itself has the right date on it but I don't think there is a way to show when I got the notice. It doesn't happen that often but I do remember getting a notice before and when I clicked on it, it was an old mention.

*edit*
The quote notification just did it to me too just now. It notified me for a post that was quoted yesterday.

Don't know if it matters but I think they have all been ones that were in the contest area.