Morning. First of all, security (TSA) only checks to verify that you have a valid ticket , that you've checked in, and that you can prove who you are. Other than that, it has nothing to do with the ticketing process. So no, you won't have to print two boarding passes. You should be able to sort it all out at the gate. Just be sure to get to the gate ore than 30 minutes prior to scheduled departure time.
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