yes i had the same problem exactly like you said. i had tried to adjust the clock manually via ssh to force higher clock but no go, the driver pre compiled in the cgminer 3.9.0 its giving less work to the chips if u clock higher. Best is running 1200mh/s i get around 90-95mh/s at wafflepool. make sure difficulties set at 2048
i just received another similar 12mega from insmart its running 110+MH/sec because the miner able to adjust clock rate, voltage mV of the chips manually. It's far more powerful than the unit from innosilicon but i get a lot of heat from it. A2 from inno is running around 39-42c but the insmart unit running 50-57c big difference. well, u get more than 10mh/sec average ofcos it does came with 1150w PSU opposed to the 1000w from inno.
Inno A2 mega, 3 intake fans, 2 exhaust fans from delta.
Insmart A2 only has 3 intake fans but compact case airflow is ok.