First things first - I've googled, and searched this forum (and google searched this forum - ie 'aadvantage segment definition site:www.flyertalk.com') but have not found a definitive answer on this as yet.

I'm gold right now and just got my notice from AA that I need x,000 miles, x,000 points, or 6 more segments to re-qualify for next year.

I have a roundtrip planned from STL->SAT via DFW, and another direct STL->ORD roundtrip booked.

Say this is my itinerary:
STL-DFW 1141
DFW-SAT 2213

SAT-DFW 1433
DFW-STL 96

Does the above qualify as 4 segments or 2? From my understanding it should count as four due to all flights having different flight numbers and due to the layover in DFW.

And if STL-SAT via DFW is 4 segments, if I combine that with my roundtrip to ORD, I should requalify for Gold without issue, correct?