controllers have a term for Wrong Altitude/Flight Level (for) Direction of Flight-WafDof (woff doff).
many years ago when given a WAFDAF, I would question it to get it on the tape...but it has become quite commonplace. Something like "CONFIRM WAFDAF".
I wonder if the TCAS installation on Legacy is like most in that turning your tansponder to TCAS or R/A etc is the only way to get your tcas on...perhaps when turning off transponder ( still unproven) they did not realize theyhad turned off TCAS.
j