Yep, I got the email notification bump this time. I also hit the 'notify' button on the board that I was missing and the notify function seemed to be enabled, so I disabled and re-enabled.
The postings I was missing was all the chatter about the night suits, if that helps.
I don't typically use the individual boards when I check in with the forum - I just go to the bottom of the board list and click where it says 'Show all recent posts.'
Also I notice that, when the email notification is working, I'm notified of the first posting from a conversation but not subsequent postings until I go to the forum and read the postings. Maybe that has something to do with it.
It seems to be working now so thanks for the fix.