Keena
Sounds to me like your new colleague either:
a. hasn't picked up exactly where she was to be 'placed'
or
b. she hasn't been explained to exactly her actual place of work (ie on the other campus), but has at least a desk to work from - on occasion - when in your office, as required.
I would suggest that you and she discuss initially to ascertain what she perceives to be correct, then if you disagree with what she says - take the 'problem' to her/your direct supervisor to confirm arrangements for future.
Probably better done sooner rather than later - then everyone will know exactly what's what.
I'm sure everything will work out just fine.
Regards
Pam
Peer Moderator