Passenger seat won't return to correct position

[HilaryY]

After a few months of falling for my new-to-me IS300 Sport Wagon, I used it to move a door and put the passenger side seat in the forward position allowing me to fit a bit of architectural history into my little wagon. When I tried to return it to the upright position, it seems to return, but does not meet with the lower portion of the seat rendering it completely unusable. 

I am driving friends around in the back after sheepishly explaining that my super fun is already being problematic. 

Help! Can anyone tell me how to troubleshoot/fix this?

Thanks!