Yes, well I think I'm going to edit that feature right back out of my game. I created a Scout unit (which is fairly expensive when you're just starting out) and don't want four of them.
The culprit file is C:\Program Files (x86)\Stardock Games\Elemental\data\English\CoreUnitGroupingTypes.xml (on my computer) and the coding that needs to be removed is:
-<Prereq>
<Type>Tech</Type>
<Target>Player</Target>
<Attribute>Invalid</Attribute>
<Value>0</Value>
</Prereq>
under
-<UnitGroupingType InternalName="UnitGroupingType_Single">
FYI
PS. This doesn't appear to work in saved games, but it seems effective for new ones.