Bogs - It may have been how you asked..... you actually are not joining the KCBS account. You are are getting your OWN account, utilizing your KCBS affiliation.
I believe your guy was correct that you would need a letter of authorization to be added to the "KCBS Account". But opening your own, with a KCBS member number is different. I know it is just semantics, but the folks behind those counters only follow processes and rules.... if you start down the wrong path (they went looking up an existing account - which has a set of rules for what you can do if you are not on it) then you end up at a dead end.
Sorry you had such a frustrating experience... but I am betting it stems from just the simple semantics of your request.
Andy /Smoke on Wheels Competition BBQ - www.smokeonwheels.com