BashfulBob:
I have just received 24 comment notifications in one day. My usual average would be closer to 1 every 24 days. 19 of these came from the one commentator. It looks to me as if something that was blocked has somehow just become unblocked.
Looking at your comments, I don't think that's the case, it just looks like someone had a binge on your stories and left comments each time. The date on the comments is assigned at the time the comments are made irrespective of when your notification arrives and there's a whole bunch that were made on the 24th.
BashfulBob:
For the record, I have not experienced any of the above problems, possibly because I don't use Windows. (I currently use Linux Mint Cinnamon, which so far has resisted trying to pretend it is a phone.)
In my opinion, a wise choice... I use Ubuntu Mate (mainly) having decided some time ago that versions of Windows from 8 onwards are an abomination and 10 is spyware central. It's also nice to feel that you're in control of the operating system instead of the other way round with the Microsoft offerings.