First of all welcome!
Second, your question should be moved to the EB forum, regarding the custom game problem you are having.
For EB, using the Trivial Script, you should use the Multiplayer link, it sounds like you used the Singleplayer link and then tried a custom battle.
The Multiplayer link has the correct unit roster for factions.
I apologize for not remembering the actual link you need.
EBII should not have this issue, but I don't know how the files will work until its released.
Hope this helps!
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