Stardock's forum structure is far more complicated than most people imagine.
Your 'Op' came from 'Stardock Forums'.... your replies have come from 'Gal Civ III Forums'....and I'm here via 'Joe User'.
What this means is the notification/update sequence actually needs a lag....so sometimes there will be replies indicated that you will never see as they have been subsequently deleted [spam].
The admin knows it's spam...but obviously the email [notification] system won't, so you still get the notification of a new comment...
BTW....my previous comment was via Wincustomize.com ...