In cgminer, there is a specific path and process of work from the pool to cgminer, to the device, back to cgminer and back to the pool again.
Bitmain messes with that process.
My first release I did of their S1 driver, I spent time fixing that process.
They ignored the changes.

So the simplest answer is to point out that what the Bitmain antminers show with their versions may not always be correct .......... on all their miners.