My seat also had a gap of approximately 1" when seated on the seat. When not on the seat there was almost no gap.
I called the Moco and spoke with a Rep and the guy really didn't want to swap the seat out... he really put up a defense telling me that my bike shouldn't have had that problem because it's build date was during the time frame when that issue should have been corrected...
Well, I pressed on and insisted and after some debate and photo exchanging, they sent a new seat to my local dealer (who had no prior knowledge of this supposed well known issue).
I picked up and installed the seat yesterday and guess what?

The replacement seat absolutely fits better!!! There's no gap. However... the foam material beneath the leather at the front of the seat is thin and in MHO poorly crafted... I doubt anyone else would notice what I'm seeing, but at this point I'm looking at every detail much closer than I normally would as I'm sure all of you understand.
Once again defeated by what should be the greatest Motorcycle company on earth...
I'm over it now... Time for the solo seat. Corbin, C&C or Danny Gray. Cost vs. function, I'm looking for the most comfy on long rides and good looks which I think all 3 OEMS provide. I only have experience with Corbin though...