I still suspect he may have had something to do with it, perhaps helping with arrangement / orchestration, or perhaps even conducting on some cues.
Composers are often "pens for hire" on these projects, and I know that there is a lot of ghost composing going on.
It is also sometimes very difficult to ascertain exactly who did what behind the scenes.
For all we know, he may have actually composed one or two smaller cues using Courage's themes as a basis in order to save time, which happens often.
Fred Steiner composed several cues for Star Trek: The Motion Picture, for example, and Alexander Courage orchestrated and arranged a lot of Jerry's music for that and subsequent scores, including 2 versions of his own Star Trek theme (one used twice) for the "Captain's Log" sequences.