seat probs
I had a similar issue with my triumph adventurer and the same issue with the rocket.
I have found that if you turn the key and use your free hand, making a fist and hammering the seat with a good whack right where latch pin is located it pops loose every time.
With the seat padding and all your not going to hurt anything, including your hand. Seems to work every time for me. Not the most scientific approach, but it works. (Fonzy method)
I can't complain to the dealer or anyone else on this one. I have the corbin dual tourer and have installed my own latch pin so that I can use the stock setup instead of corbin's "erector set hardware kit".