Yeah, I believe it's completely incorrect, but I haven't done enough testing to say so with absolute certainty. And outside of that post I've never heard of anyone finding a solution to the wingmen problems.
By the way, my guess as to why this hasn't been fixed, is because at some point ED completely rewrote their wingman code for DCS:A-10, and rather than fixing an obsolete system they presumably decided to just wait until the DCS:WH/DCS:BS compatibility patch to update the BS system to the current standard. Of course this is all pure conjecture on my part :).