Judging from the images, you also have a really old version (that Humvee is hideous). I actually had plans to revamp AD, but they were abandoned due to time constraints and other projects. At any rate, you should use a more recent version. Don't really want those god-ugly older humvee models being attributed to me.
Here's a download of the last stable version, with some unreleased tweaks. However, due to some weird bug in restoring it from backup, some folders have uppercase letters, and thus this probably won't work on Linux without minor modifications. That's up to you, this isn't an official release. http://www.mediafire.com/?j1ezy5buv0a7j7v
Also, please note that in order to abide with the licensing of the AD mod, you MUST include either the following AUTHORS file or create your own which credits everyone mentioned in the file. http://pastebin.com/kavwFdbC
I don't think it the 0 size units that cause the confusion in the AI, It is expensive units and upgrades. While humans can see the need for the upgrade and save up for it, bots just spam starter units and never upgraded. Therefor they never get very high (I am talking about Enemies & Allies.)Actually, the size zero units do cause a degree of confusion, but AD was never intended to be a MegaGlest mod, and was tailored to GAE's gameplay. There's a tag that could be added to the size zero units so MegaGlest treats them properly, but that's (for whatever reason), not the default handling of size zero units. The starter versus late game units is evident in pretty much every mod, but never really caused an issues in AD, as in large numbers, the starter units can be really strong (an advantage given by their ranged attacks). The AI could benefit from some diversity, but they'll still give a serious challenge on a CPU-ultra level.