I haven't submitted any claims since. That's quite a strategy for Marriott, accusing customers of fraud for Marriott's own faults. I cancelled bookings and resubmitted multiple times because agents are plain wrong about math and taxes (and stubborn about that) or repeatedly "can't find rate", or just don't reply to my emails. So the only way was to cancel booking and submit new one again in hopes to get a competent agent. Apparently trying to get BRG to work as advertised in now "manipulation".