I've had this problem ever since I moved to Windows 7 on our machines. If the terms are manually set to correct time zone, it seems to pick it up, but it won't adjust the time zone at all.
If you are not on Windows 7, I suggest making sure it's correct on the BOH machine, going into the data folder and deleting the timezone.ini file, restart CtlSvr, then refresh Aloha.