I get it, you're having problems with anything beyond the first three pages of results, I thought you just meant anything past the first three individual results. You're correct, if I go to Page Four, everything is all gone.
I'll send a PM to one of our tech guys to look into it, in the meantime, might I offer the following suggestions for a more User-Friendly and convenient experience, this is also my favorite way to do it:
1.) Before you log out today, go to the main, 'Forums,' page and click on, 'Recent Threads.'
2.) When you get to the next screen, click the box that says, 'Mark as Read.'
3.) Next time you log in, you can go to, 'Recent Threads,' and anything that you have not read will be emboldened. You can scroll down (or change pages) until you find the last emboldened thread and then go up from there. If a thread is not in bold, then there have not been any new posts in that thread since you have last logged out.
It's a very quick way to search through thread titles and only search threads with posts that you have not yet read.
Vultures can't be choosers.