I e-mailed Racefactor and received a very quick reply instructing me to send my motor back to them and they will get me taken care of along with a reimbursement for the shipping costs.
I know the motors run great and so far with this mix up the customer service seems really good (fast responses to e-mail - which is rare in any industry).
You can't fault a company for making a mistake, it happens to all of us, but the follow up to the issue can really build confidence if handled in a professional and timely manner.
If the rest of this situation gets handled in a similar fashion I will be a GO engine customer for a long time.
Thanks for the replies.
I'll keep you guys posted.