this is exceedingly weird - the most likely reason would appear to be overenrollment, but given the fact that GULC has extended its application deadline twice in the past month and a half, this in all likelihood is not true.
also, to the OP, no offense, but your numbers are not really above average for GULC. Your GPA is around average for them and your LSAT, when averaged, at 169, is exactly their average. That being said though, having graduated from HYP with those credentials, you are a prime candidate for them and on the surface at least should have gotten in outright. My guess is that this is some bizarre form of yield protection for them. Maybe admitting you for next year's cycle is a loophole in the rules for them to not have to include you any statistics for their USNWR rankings if you choose not enroll. My guess is that if you sent them a letter telling them they were your first choice and that you would definitely enroll this yr if offered the chance, I am pretty positive you could be at GULC this fall if you really desired.