When I first started with AirBnB, I could arrange the order of my scheduled messages by putting a number at the beginning of the title, i.e., 1 Welcome, 2 Arrival, 3 first morning, etc.
However that seems to have changed.
My first two listings are still numbered - but my new third listing needs ALPHA letters in front of them to put them in order, i.e., A Welcome, B Arrival, C first morning etc.
Finally the scheduled msgs for my third listing is in the right order AFTER my first 2 listings.
Try alphabet or numbers!