I got accepted to LUMS this year but couldn't meet the condition. I'm going to apply again once...

I’m going to apply again once I’ve fixed my Alevels grades in this Nov/Oct session inshaAllah.
I have two questions. 1) Will I need to give SAT again if I’m applying again or can I use the same SAT score I used the last time? 2) Does the fact that I got accepted before help me in any way or increase my chances of getting in this time around? Please let me know. Thanks!