RS,
If what you are saying proves to be correct, and there is a software error of that nature, surely this would have been picked up by someone in house (I mean, if J* regularly overbook this would have manifested itself before now, and no ones fallen out of the sky yet). That being the case, it would be a known problem, one that would seem serious enough to need rectifying ASAP (considering the consequences of a "green" (i.e. the known problem wasn't known to them) dispatcher giving the pilots bad numbers...not too many alternates over the bite). No wonder the silence is deafening......