probably for a variety of reason but one is there are two different lists.

The "published" one is the gate waitlist which includes CPU, YBM and GPU/RPU/miles folks -- that is not published until OLCI starts and you will not be shown until you check-in.

Then there is the "waitlist" used before the gate -- it is different for a couple of reasons, such as folks outside their elite window are not eligible yet. It is my understanding this list is not a prioritized waitlist, not sorted but a list of those eligible to be considered for upgrades. The system dynamic builds a list each time a sweep is done and then throws away the prioritized list. So there is no way for the phone agent to tell you your position - just that you are on the list.