Do you have the impression that this is an exception that they made for you, or a policy change?
Tough to say--it was a bizarre series of exchanges over the past 6 weeks that--in the spirit of helping others--I'll paraphrase here:
You didn't book it through the official site. Yes I did, and here's the confirmation email.
LHC only credits 3x. The T&Cs state all Chase Travel credits at 10x.
You checked in at the hotel incorrectly. I showed the confirmation email and provided the CSR I booked with.