The "wrong one" looks exactly like their online version and is the last photo in the string with all the tuck-and-roll stitching etc... But they did delete the hidden mount for the backrest and its accompanying flap which covers it when not in use. The person who took my order also got everything just right, all the instructions were correct and spelled out right there on the shipping invoice, and she was exasperated that they missed the instructions.
Maybe they'll run a special discount on seats without backrests...
I know they began making the replacement back on the 11th which has been two weeks now, so based on the first seat's turnaround, I would expect a package on my doorstep within a week from now.
It's supposed to rain for the next 7 days so no worries!