Trying to use the provided templates where possible. In this case, the sub-template:
is written in a manner that makes seemingly makes it impossible to utilize more than one of these controls. It appears to set the parameter <LEVER_ID>Alternate_Air</LEVER_ID> in a Type="Override", which then seems that it isn't able to be set from a component that (in my case) is referencing ASOBO_ENGINE_Lever_AlternateAir_Template.
In case it's not clear, this is for a twin engine aircraft that has an alternate air control lever for each engine.