After having made changes to two seperate bookings (to date and time), they have both disappeared from MMB. One booking was changed online, the other by calling the Exec Club (no fee charged). I can access the bookings by individually inputting the reference number and my surname, and my EC number seems to have been stored properly (i.e. they are linked to my EC account).

But still nothing in MMB.

Any reason for this?

(And before any prodding and whatever, think about searching for "MMB" and other terms that hardly yield decent search results and/or only endlesly long threads that have long passed their usefulness.)