I have had trouble right from the start, but I have been able to get two 10K base miles bonuses. After all, that was the whole purpose of having two cards! But as stated, everything has always had to be handcarried over in order to post. One positive aspect of this was that I could control somewhat as to when the 10K hit the SM acct simply by waiting till after the end of the year. Then the base miles would be credited to the new calendar year.