Seat Back not Fasten
Turns out the seat back is not fasten on one side. They simply forgot to insert the 2 screws. This probably didn't help, but the cushion is still uneven.
It is not a big deal as I am handy enough to drive 2 screws and fix it, but it shows what a sloppy job they did. I think other have complained about seat back falling apart.
... Sorry, I don't know how to rotate the image ...
2017 Jay Flight SLX 195RB
2013 4.0L V6 Tacoma