I can read every post, one at a time, slowly in a given thread, and it still puts me back at 9:30 this morning as the last post I've read. If it's a feature issue, then you must have gutted the feature since I left work at 5:30 pm this afternoon? Because it worked well until then.
The performance thread is only for board speed/slow-loading problems.
Also, I get notifications whenever a new thread is created in this section, so creating a thread for your issue will get you assistance in a more timely manner.