I want to say patio11 addressed this, but I may be misattributing. In any case the advice I recall is to, if anyone notices or complains, offer them a direct link to the lower price, possibly accompanies by a 10$ off coupon. An apology about the mix-up is optional, as is bringing up the fact that you are the founder, and you're happy to chat with customers any time on how to improve the service.