If your just getting sore on the bottom, inside of your thighs, that is "monkey butt".
Get yourself some Monkey butt powder, similiar to baby powder and apply to that area before riding. works wonders!
As far as Corbin seats go, I have one on my bike. They pretty much ignore your instructions when you order the seat.
I specifically asked for extra padding in the front, to offset the natural forward lean of the seat, and stop from sliding forward.
When I received the seat, it was identical in shape to the stock seat. I had to send it back for adjustment. I waited about 10 days before calling and asking what the status was.
OH, we will get on it right away was the replay. UGH!!! I have the seat back now, and it is a good seat, don't get me wrong, the quality is good, they have the extra padding almost right. It could use just a bit more, but that is just me. Corbins are great seats, its just a pain getting them to build what YOU want.