I know this is an old problem and maintenance finished a while ago (this could be the reason, idk). But there's an issue going on with one of my alerts right now and it doesn't ping me in my alert section (the only way I could tell was because of the latest posts on the main page). Maybe more of my watched threads are like this, I'm unsure. I have a ton of threads on watch, so I get alerts very often and I've only had two in the past hour or so. 
