3rd seat won't fold down

[EricH3]

It could be that the seat isn't fully latched in place in the upright position -- not locked down completely. Try firmly pushing it down to ensure that it is latched, then use the 1-2 levers to fold it up.

I had this happen with mine once, and discovered that the seat hadn't been firmly latched in place upright -- I give it a good slam now and listen for the latch to catch -- no more problems.