I thought you wrote "doesn't" rather than "does" earlier. So the only odd thing here is my ability to read.

But it's not recognizing it, even though my cell number is now primary. It still prompts me for my Mileage Plan number when I call from my cell.

However, when I just called from my "old" primary number -- my home number -- the AS system did recognize it.

There appears to be a delay of at least a day between switching the primary number on the AS website and having the AS phone system recognize the new primary, since it's not recognizing my cell today after I made it primary yesterday.