If the recs that have gone out show a higher GPA than what the sororities will receive, let your rec writers know. I'd have no problem sending a note or email to the contact and letting her know. Mistakes happen and it speaks well that you want to show honesty. Plus, you'll sleep easier.

I recently saw it for the first time in a news article. I didn't think it was that common.

::shrugs shoulders::

I'd say it means moving up or advancing in elevation or stature.

I guess I fall in the group that's surprised that phrases like "rising sophomore" are unfamiliar to anyone. I thought it was pretty standard.