This is not a thing. You can't "set multiple settings to the fob". If you program the fob to memory 1, seat moves to memory 1 position on unlock and door open. If you then program that same fob to memory 2, that replaces the prior programming.
This is correct. You can basically have 4 different memory positions. 2 using the 2 buttons by the driver seat and a different 2, one for each of the 2 key fobs. See page 2-8 of the owner manual. Here is the note: NOTE
Individual seat positions can be
programmed to the two available
programming buttons on the side of the
driver's seat, plus one seat position for
each registered key.
Can't find in the manual how many "registered key" the CX9 can support but it is at least 2 and if more registered keys are supported, may be more seat memory positions that can be programmed.
This is they key point : plus one seat position for each registered key.
As in one memory seat for each key. AFAIK you aren't able to program multiple settings into one key.