I just noticed on my Visa account that Marriott charged me an additional sum of $800+ the day after my departure. How weird is that . On the proper check-out day, they only charged $300 (that charge should have been around 700!) but now I've been overcharged by nearly $400.

The accounting office is closed today but I'm very curious as to how that could be. I've never had a delayed/late charge like that made by any hotel.
Also, I don't see that I've been awarded the extra bonus points for my last couple of stays (part of a promo I signed up for). Ugh I loathe having to follow up on this kind of stuff.