I have both phoned and emailed the missing stay requests. They post quickly, although nobody can ever explain why it didn't post correctly to begin with. If I'm on the phone, I sometimes ask "Was something weird about this stay?" The answer is always no.

Last time I phoned (2 months ago), the agent was able to post the stay immediately. Points were in my account in 5 minutes. I was on the 2x points promo, and the promo points were correctly posted as well.