That person, Kay13, is applying to bio programs; check their profile. Not sure why they posted here, maybe thinking that a uni releases all decisions/interviews at once. Joanne Murray sent out that application completion email which specified a date for admitted students to visit and ask questions, leading me to believe there won't be on-campus interviews for UPenn. Maybe phone, but we haven't had any information implying any interview invites have been sent regardless of format.
Something similar happened with Wisconsin-Madison in this thread -- the interviews posted earlier were for communication arts, a separate program from the mass communication offering. I'm certain that some people read it this way, but I sure didn't.