What we were told last cycle is that after you interview for Erie, SH or Elmira, your file gets sent to Erie (regardless of the campus you interviewed at) and the adcom there decides if they would like to accept/alternate list/reject you. From there, if they choose to accept you, they will see what availability they have at their locations based on your learning pathway selection.
I am unsure if Erie is the ONLY adcom that chooses what applicants to interview, or if there are separate committees at each campus that have a say in who they interview. If this is the case, that would probably be why people have only received IIs from Erie, and we should be expecting more to come for Elmira or SH soon. It would be interested to see if someone knows the answer to this? Regardless, this is a whacky cycle so who really knows.