Marriott Profile: Date of Birth Changing

Hi,

I had added my correct date of birth to my Marriott profile a while ago. When I checked all my information again recently, it was first changed by a day!

I had planned to call Marriott to change it (since one cannot edit it after setting it), but now I checked again just before calling - and I saw that the date had changed yet again to now two days earlier than my actual birthday!

Does anyone else have similar experiences? If yes, what did you do to fix it, and did it "stick"?

Please let me know!

Thanks!