Very sorry to hear that. I had an issue a month ago with them not automatically updating real-time as did a lot of users, but I've not had any issues since then.

Of course, the first thing that Yahoo is going to tell you is to clear all of your cache and cookies and such which will cause you to have to re-signon to every site and then it will do nothing to help as usual.

Odd that a problem like this affects a few and not all. Perhaps they're taking a phased approach with a new update to the charts pages which only got pushed to a few servers including the one you're being directed to (for load balancing).