The more I read this the more I thought about it. It's actually and interesting question. How exactly does ME know to pick up a bag. I'm assuming that there is an automated bag scanner at the airport and any bag with a ME tag gets scanned and directed to an ME staging area rather then going to the luggage claim area. ME personnel would then need to either scan or read the luggage tag to know which resort to take it to...
I don't think there was flight information or a date on the ME tag so what would prevent ME from picking up the bag when it arrived, no matter that it was a day early. Once the bag arrived at the resort Bell Services would be confused because they had a bag without a corresponding room, but I doubt they would send it anywhere. You could then mention at check in that your bag arrived early and have bell services bring it to your room at that point.
OP, you might want to post this question over on the transportation thread. They have people who might understand the process better.
Ty