Now, this thread is exactly why this forum is so valuable.
Problem encountered by end-user, sellers rep willing to listen and entertain the idea of error. That in and of itself is really rare nowadays, but for the seller to then solicit further input from the original complainant and offer a venue for that knowledgeable customer to provide a valuable resource for the community at large at the retailers expense is precedent setting.
Kudos to all involved - this is how to responsibly raise a complaint, and even better it is how to responsibly handle that complaint as a customer service issue.
Well done, gentlemen, well done.