Well, like the thread starter, I too am still chasing down missing stays from a month ago, partly why I started the 'what's your missing stay ratio' thread recently. I was on a matress run to YYC and jumped around over 3 nights to requalify for elite [i[and[/i] earn a promo at the same time. One of the stays from YYC Marriott has posted while the other hasn't. There doesn't seem to be too much rhyme or reason as to which stays don't post and which ones do. And it wasn't a case of me forgetting to include my MR number. In fact, not only were all booking made on the website which has my MR numbers stored in my profile, I also verified the number was on the reservation both at check in & check out AND that it was printed on the hotel receipt.
I will admit to being disappointed with MR in terms of the number of missing stays for whatever reason I seem to suffer as well as the hoops I have to go through to get those stays to post properly to my account. Hopefully someone is listening (or reading).