Common app PG

I sent my common app to my ED school before November and now I’m modifying it for my other schools. I realized that the PG (post-graduate) option on the Activities page is probably meant for people who are taking gap years, but I’m not. I checked PG for 2 of my activities and sent it to my ED school. What does PG really mean? If it does mean gap year, I should probably email the school about it, right? What should I tell them? Am I in huge trouble? I’m also needing to email that school about two accomplishments that happened after their app deadline so maybe I should include these two situations (PG issue and accomplishments) in the same email??

I would just email them to get it sorted out. things happen. Just don’t sound anxious in your email. Word it politely and maturely