Hi Nissa,
When you took these two Official GMATs, did you select 5 Schools to receive your Score (or did you not choose any Schools at that time)? I ask because if you selected a particular School to receive your Score Report for both attempts (and you did not 'cancel' either of them), then that School will receive both Score Reports (meaning that you will have no say in the matter). In that same way, any School that you selected to receive one of the Reports will receive that Report.
In your post in the Admissions Experts Forum, you named some highly-competitive Programs. Many Business Schools view an Applicant's Quant Scaled Score as an indicator of how that Applicant might handle the 'academic side' of the Program - so your first Score (with the Q48) would almost certainly be the better Score to send.
GMAT assassins aren't born, they're made,
Rich