resitting an AS module twice?

-ok so, i got a C in A level maths and a B in AS maths
-i'm resitting All the A2 modules
-but i want to also resit 2 AS modules again(s1/c2) to get an A overall at AS and maximise my UMS
- so my question is will me resitting a module twice ( once in A2 and again in my gap year) affect my application or will unis still accept it e.g like uni of southampton?

btw i will be resitting c3/4/s2 for the first time again so thats ok i know they'll accept tht it's just the AS ones i'm worried about since i want to resit them again.