You got it wrong.It sees only two blades but it's looking more chips than 16/blade.I think it is possible to chain two boards together to get total 30 chips per chain.Two chips have to be removed to chain them easily.Somebody did that with S1 blades (think it was sobe-it) but I don't know how well it really worked.
I have tried with 4 blades as controller (controller chip) has 4 uarts,but firmware only finds 2.
I did do it, it ran faster BUT not as fast as it could because we were having problems with speed of a single blade using usb to uart converter. a single blade would hash from 25gh to 45gh and the mod I did it ran 55gh to 80gh. It may work if its done using the regular controller board but you would have to edit the firmware for the right amount of chips and time out setting. I know this because I ran a s2 blade on a s1 controller and it would get ~95gh but would lock up in about 5 min.