Free night certificate excepted:
Leicester Marriott Hotel
01/05/16 - 02/05/16
(59 base + 30 elite+ 500 extra)
Needless to say, the room charge was actually more than the $5.9 credited to my rewards account.
So I'm not alone in having constant problems getting the correct MRP credits. I seem to spend have my life dealing with Cork getting things corrected.