You may be able to re-flair it to the right double flair. This should have not happened in the first place, but it does happen to the best of us. I would check the other flairs to make sure they are done properly as this will cause cause a major problem if a lines blows apart under hard braking. Trust me I am not questioning your work at all, but your brakes are your best friend second to steering. Good luck to you and hope your problem is solved.
Adam
Also you can get the flairing tools needed at a local parts store, I personally got mine through Snap-On but that is just me...