So that kind of explains what's happening but not really why. For some reason, your JJ2+ is trying to include multiple files that are different versions of the same libraries and therefore conflict with one another.
HH17 does not include Jazz1Enemies.asc, only Jazz1Enemies v03.asc. It also does not include TrueColor v12.asc, only TrueColor.asc. (Truthfully I'm not even sure why you have a file called Jazz1Enemies.asc, because every upload on J2O uses either v03 or v04.) Nor, as far as I can tell, does HH17_level01.j2as reference either of those two non-included files. Yet it seems you've done something that makes JJ2+ want to include them anyway?
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