I applied for the CO OnePass Plus card over a year ago and got the miles in my account. If I apply for the United Mileage Plus Explorer card before March 1 and put down my current United frequent flyer # on my application, will I have difficulty receiving the miles? (The new merged accounts will be based on Continental's numeration system and won't include the current United frequent flyer #)

My preference is to wait until some time after March 1 to apply, but then my concern would be whether or not I would receive the miles by entering my Continental frequent flyer # for a second time on an application (first time was for the OnePass Plus card).

How would you proceed?