Here's the e-mail discussion w/ the rep, after I noticed the build sheet did not include the rear seat option as specified:

Me: Unless something has changed for 2022 that I'm unaware, the rear seat option can be added as an override of the standard 1320. I've attached the sticker from one of the 2021 cars I found locally, but didn't want because it's Pitch Black. It retains the standard cloth interior, but has both passenger seat and rear seat options (see red oval in lower left corner). It's definitely possible, although confusing. Even the online "Build Your Car" feature doesn't disable the Rear Seat Delete selection when the Rear Seat Option - Cloth option is selected.

The other way is the 1320 Plus package, which is primarily an interior upgrade that includes both front passenger seat & rear seat along w/ leather upgrade. We're not interested in that option.

Rep: Yes that has indeed changed from last year. Once you select the 1320 package, the Rear Seat Cloth options is not available to select. It is not available in the 1320 plus package either. Once you select the 1320 package, it does not allow the Rear Seat Option as an available option. So if that is an important option, I will put you on a waiting list and if/when it is available, I can let you know and proceed with the build from there.

Me: Yeah, one of the reasons we decided to simply order a 2022 because half of the 2021s we've found weren't ordered w/ the rear seat.

Just to be clear, if we add the 1320 Plus Group for 2022, will that include the rear seat is it does for 2021? If so, we'll go w/ the 1320 Plus Group.

Rep: No, the 1320 Plus Group does not give you the rear seat.

This is everything in the 1320 Plus Group.
Power Tilt/Telescope Steering Column (SUB)
Door Trim Panel w/Ambient Lighting (CBR)
Nappa/Alcantara Performance Seats (*SL)
Heated Steering Wheel (NHS)
Black-Edged Premium Floormats (CCJ)
Premium-stitched Dash Panel (JAD)
Ventilated Front Seats (CAJ)
Radio/Driver Seat/Mirrors Memory (LEW)

Once you get the 1320 package, you can not get the Cloth Back Seat. Maybe it will change later in the year, but currently you can not get the Cloth Back Seat with the 1320.

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This guy does special orders on a regular basis so I'm 99% sure he's got his facts straight... even though it makes no sense to me.

EDIT: I just posted a question on the General Discussion forum asking if anyone who works at a dealership can confirm this.