When I hit one of the memory buttons on the door, is it supposed to pull up the radio presets for that user (XM FM AM)? I noticed it adjusts the seats, but my radio presets didn't adjust when I was using key 1 (I usually use Key 2).

 

No, the door memory buttons adjust the driver's seat and outside mirrors, but have no effect on radio or climate control settings.

When linked to the car, each remote retains a full set of the settings/presets- seat, mirrors, radio and climate control.

 

Please explain your mention and how to get it to work "When linked to the car, each remote retains a full set of the settings/presets- seat, mirrors, radio and climate control"

 

Page ninety-something of the owner's manual, IIRC.

Set the DPMS (seat/mirror positions), climate control and radio presets (AM, FM, XM/Sirius) for position 1, then link remote "Driver 1" by holding the lock and unlock buttons on the remote until the light flashes.

Set the DPMS, climate control and radio presets for position 2, then link remote "Driver 2" by holding the lock and unlock buttons on the remote until the light flashes.

Each remote will hold the last CC and audio settings used with that remote, as well as mirror and seating positions, so two different drivers can set up the TL to move to their individual preferences using the remotes.
If a person moves the car and resets the seat/mirrors/radio/CC (like a valet), using the remote will return everything to the remote's settings.