@David **********
I think your accountant was feeding you a line of crap. And seeing as a yearly extension costs just 1900baht at the immigration office I'd say something wasn't right with that at all :(
I do believe what they were saying was you can't get a year-long, multi-entry visa from the thai consulate in Penang anymore without being listed as the director of the company on the paperwork.
If they were saying you couldn't border bounce for another 90 day entry on a valid multi-entry visa at the Ranong border with burma, I believe they are totally wrong about that and you can bounce for 30 day visa exempt entries and to activate another entry on a valid visa.
I can't find any information that says you can't bounce there and given the number of people who use that crossing it'd be all over the inter-web by now if it had changed policy.