When you click onto a thread you have previously read or posted in you are automatically taken to the last place you landed or read. So, if the previous time you were on the thread is now page 24, try clicking on the next pages and end on the most recent post. Hopefully then, when you next click on that thread, you will be closer to the most recent posts.
I hope this is clear for you, if not please do email firstname.lastname@example.org
Digital Community Officer