When you amend for the second time did you start with the first amended return? You should be able to mail it. Just ignore any efile errors.
And the 5 licenses shouldn't have anything to do with this. That's not the same as the 5 efiles. But I think you have to print and mail a 2nd amended return. If it won't print the switch to Forms Mode and open the 1040X and print it.
