I've been experiencing this issue since I became a member here on this website.
I wasn't getting notifications, then I changed the settings and some were received, some weren't.
Some were visible here under Notifications, but no email notifications, then changed the settings again.
Here's what I have now:
Here's my notifications and as you can see the last one I received was on Jun 8:
Even here, some replies I got to my topics, are not visible at all.
Now here you can see I got these 2 replies yesterday, June 9, but they don't show up under Notifications:
Another thing: I noticed that when I create a new topic, the "Notify me when a reply is posted" is unselected. Is there a way to make this selected by default?