When logging in to different users without going back to your user, and at the same time commenting on different threads with these users, it creates false alerts to users that don't participate or follow these threads.
For example, I've logged-in to user A, B, and C. I've commented with user A in thread Z and then logged in to user B and commented in thread X, and then logged in to user C and commented in thread Y, and so on, multiple times without going to back to my user.
What's happening is that user A gets notification that people commented in a thread X, but this user hasn't posted any comment there - this user posted comment only in thread A. This is the same case with user B and C.
If you can, please check this issue.
Thanks.