Jump to most recent post not working

When I'm on the 24 hr active thread list and I click on the arrow to jump to the most recent post, it opens the thread but at some other point in the thread, sometimes on page 1 of a 4 page thread.

Strange.

Some times it works, but it seems that the problem is with the same ones each time it goes to the same post but it's not the last one. It's not a big deal, just thought there was an easy fix.

I have noticed recently that when I click on the arrow for the last post, it will actually take me to the last post I read in that thread previously(if I have viewed that thread before), but not necessarily the last post in the thread, if that makes sense. I have noticed it doesn't do it all of the time, but I have not paid any attention to when it happens, or in what forum/thread, or if there is any correlation...if any of that makes sense.
Going to the last post I have read, instead if the very last post is kinda kewl for me, because it takes me to the point where I left off last.
If it is a thread that I have NOT previously viewed, it always goes to the last post....such as this thread.
hth

OK, well, to be honest, I won't be spending time on this since the forum software will be replaced in the next few months.
Thanks.