Yes, leave it be. You cannot file the second amended form until the first one is accepted.
Also, $13 is a nuisance amount. Either way, whether you owe or IRS owes you, just leave an error like that alone unless they send you a letter requiring you to correct it. We all make errors and that's a small one :-).
Of course, since you were reviewing your work after you filed the amended return, next time reverse that order and finish all your reviewing before you actually file. I like to get things done and it seems so easy in TT it's tempting not to take the time to switch that around. Fortunately my wife makes sure I print out our return and go over it in detail with her before I submit it, saving me many an amended return :-).
