Here is a temporary solution till riz gives you further feedback.
When you click the New Posts link, the actual link behind it is:
https://www.pakwheels.com/forums/search.php?do=get[B]new[/B]
This shows all your unread thread and sometimes doesn't show all the threads that should have been there even though they are unread by you.
To get around this problem, right click on New Posts and copy link location.
Paste the new link in your address bar and change it like below:
Instead of getnew at the end, change it to getdaily
https://www.pakwheels.com/forums/search.php?do=get[B]daily[/B]
Try this, it will show more threads.