We don't know facts, so speculating won't do any good.
It could also be, that BSP is like "Oh well, we are not moving a finger (or our machines) unless our MOQ of x is met. When MOQ of x is met, we don't care who buys the sets or how many parties are involved in buying our sets, just as long as we get our money."
I don't think they much care if there is a second, smaller party, because MOQ is already met, might as well produce 20 more sets. The machines are running anyway.
I can understand Sherry might feel to be stepped on his toes, and thus his interference (cancellation) with this GB.
But I will never buy my GB-ordered set at Sherry's store. I don't like his business/GB attitude and his shop itself.
But again, all this talking won't bring us any further.
Main concern is: What's up with our money? AFAIK payment to BSP went out. So, did they already make the sets? If so, is Sherry forcing BSP to not hand them over to us? Or do we get them after all? Are you, kboardvintage in contact with Sherry and working on a solution?
I don't care how this ends. All I care is that at the end of the day, I either have my money back or my ordered keycaps.