"No only if there is a NOTAM there is a temporary appendix #T1, #T2 etc. In MIA there is one for Rwy 09 unfortunately called T1. I suspect the crew made a wrong assumption that this means a takeoff from T1."
Thanks again Croc. I couldn't find a runway/departure NOTAM for Runway 09 at MIA.
The "#T1" designation would seem to be a very poor wording choice for the EFB performance selection, shades of AA into Cali with two close fixes named "Rozo" in fix choices.
I can see the cheese holes lining up. Not sure when looking right while taking the active didn't ring a bell with a view of the unused runway runway back to the start point, but understand there are plenty of factors to look at. Sometimes the elephant is right in front of us staring and nobody sees it for whatever reason.
It was a close one, glad everyone is safe.