Received a conditional offer - but already graduated

[lp222]

hi everyone, 

today i received a conditional offer for the university i want to go to. this is confusing to me because i graduated last year in 2022 and have all of my required credits, a good average, and the prerequisite courses needed for the specific program. however, im back at my old high school for one semester just to take extra courses like biology, math, etc. these are not needed for the program i want, though, and i really just took them to have something to do during my gap year. so basically, they are waiting for stuff i already have finished. this is worrying me because do the grades i get this semester suddenly count towards my application? i already finished high school, got my diploma, everything. do they just say that for everyone or something? should i be panicking to get my current grades up? for context, the program i got into is psychology and the stuff im doing now is chem, bio, and math. if anyone knows more about how this stuff works than i do, please help! 

thank you so much!

Edited January 20, 2023 by lp222
added another lil question in