Hmm - I wonder if that where my missing trips may be? I've had a ton of upcoming stays that have gone missing from "My Trips" or are currently missing, so sounds like the whole "My Trips" is a mess. Had a points reservation a few weeks back that had been made in September; it was showing up until about a week before and then it disappeared from My Trips. I'd called Marriott and it seems like it was in one system but not another. I've got ~3 upcoming stays that have been booked but are missing in "My Trips" now, but other trips show up OK. For one of the missing ones, I got a Push notification from the app that I could check in, but when I go into the app, it's still MIA. So it appears it's lurking in the background somewhere, but not able to view it or check in. Not really giving me much confidence when things disappear like that.