Did I screw up?

So I just received my Gold card, paid an upcoming flight plus 1 bill. I also just applied for the Cobalt after receiving to take advantage of the better multipliers. I just read that merging the 2 cards for MR points will "reset" the bonus requirements. I can still make the $1000 for this month to get the welcome bonus for this month with some more purchases within the next few weeks. My understanding is is that I should still be good, is that correct?