HaloMods "Classic" Read-only Archive

I've been working on a vehicle mod. Started off by copying the banshee's meta offset (or whatever it's called) over the scorpion, then I gave it back it's scorpion hlmt and so on 'til I had the vehicle I wanted. This involved dragging a few things into the map with Insolence. Then, upon discovery that the coa I'd followed had also led to modifying the banshee as well, I duplicated the banshee, unmodified the duped one, and switched the 'shee's vehc to point at the new one. Lots of tweaking was done in Insolence, DotHalo, and ADI, and also, I renamed the scorpion in hex workshop. Finally, I was happy with my new vehicle and decided to take it to work so we could test it on our lunch break (see if the balance needed tweaking). Much to my chagrin, I discovered that in a team game, none of us were able to switch away from red team.
Now I've d/l'd a few mods before that had this problem and I'm wondering why. What causes it? How can I prevent it when I make a mod? How can I fix it?

was "Cannot Change Teams" enabled in the gametype editor?

Where is that?

in the gametype

Um... I haven't messed with gametypes at all. You're talking about the gametypes you set up when you're in the main menu, right? Or is there somewhere in the map itself to set them up?
Anyway, I discovered that it is possible to start out a game with everybody on red team and then, once it's started people can switch, but it's annoying. I tried setting up the teams and then switching maps, but it told me I had to organize into two teams... despite the fact that we already were. When we all went back to red team it was happy again. I've seen this on other mods (as I've mentioned before). One that we just noticed last night was Selan Forest. Can't do teams on it either.
So any idea what I could've screwed up?
[edit] I'm SO stupid! I use DotHalo to add maps to my mainmenu, and I hadn't noticed that the little tick-box is set to "1 team" by default. Fixed my map and all the others I had.