There are actually 8 Protodevilin, though Goram and Zomd are like the two who act as one, they are seperate.
The Supervision Army was originally controlled by the Protoculture. The Protodevilin and Geperunichi took a large chunk of the Supervision Army to use to their own ends. Obviously when they were sealed on Varauta 3198xe, the Protoculture under their control were released.
I think you are mistaking the Supervision Army of old with the new one in Macross 7. In Macross 7, the first soldiers mind-controlled to operate Geperunichi's new Supervision Army were of the Megaroad 13 Colonization Fleet.
For more info, consult my Protodevilin website by clicking here. If you can't find the answer there or don't understand something, feel free to PM me or something.
It's a little old, so forgive some spelling and grammar errors. Other than that, it has almost all the information you can find and my own observations and studies of the Protodevilin throughout the Macross 7 series.
I don't believe this is correct. I have always thought that:
1st.
The Protoculture created the Meltohlauedy and Zjentohlauedy
Then
The Protoculture created the Protodevlin, who used mind controll and brain (spiritia) draining (for lack of a better description) to control many of the Protoculture people. They also took control of many parts of the Meltohlauedy and Zjentohlauedy armies to create the Supervisional army.
This is the army that the Meltohlauedy and Zjentohlauedy fought with for thousands of years, a war which eventually eliminated the existence of the Protoculture in total.