I changed the way the board tracks your unread posts to a better system designed exactly for ^ reason.richardsimkiss said:"The threads below have not been updated since your last visit but still contain unread posts."
I can see how it could be useful... as there have been times when I've been called away from the computer and as a result lost the list of threads that I hadn't read
Under the previous method you read what you felt like then it timed out, resetting what's to read for next time you visit. This is okay except if you have to wonder off or don't have time to read everything. The new system solves this and a couple of other problems.
Under the quick links is "Mark Forums Read" which lets the board know you've read everything you want to and will stop showing you old stuff. Trinity, doing this should solve the problem you explained.