Originally Posted by PanHam

Yup, United's tangled way of sorting out names in their system. It's only a problem if you selected a title of "President" as a joke, and UA agents can't sort out whether your name is actually President, or it's your title. I've had some foreign *A carriers take a second look at it, as well.

Needless to say, I switched back to Mr. With Mr., there's no trouble at all.