Actually, it doesn't look fixed. I think it merely looks that way to you, because you actually are in the Pacific time zone. I'm in Central and it's showing two hours ago (ie. also showing Pacific time) for a test call I just placed.
This is consistent with test calls I did about ten days ago. Sometimes I'd see GMT, sometimes Pacific... Both wrong. But never Central time. The call logs, on the other hand, have been correct all along. It's just the Voicemail page's times that are funky.
Customer Since: November 2009.
Number Port: ordered 12/14/09; completed 01/07/10.
Hardware: one Hub, one Scout, one Telo.
Service Level: Annual Premier.