Email Time changes when email is moved

[dave]

I'm using OL2002 w/XP at work. I've noticed that when I
move an email from the server Inbox to a Personal folder,
the time on the email stays the same. But if I move the
email back to the Inbox, it loses 7 hours, but if I again
move it to a Personal folder, it stays the same! Back to
the Inbox, and it loses another 7 hours. I've check OL's
time zone and it's correct. Ironically, I'm in MST, which
is -7 GMT. Not exactly a catastrophe, but very annoying!
Any ideas? Thanks.