Well, that was embarrassing . . . I sent out an email to my leaders in my AHG Troop using TT’s mailing list from my own email . . . I was logged in to my AHG Troop page at the time. But somehow it sent to the leadership of my sons’ TLUSA Troop, for which I also have a TT account.
The subdomain emails feature will solve this. Right now, if your email address is associated with multiple troop and you send it to a magic mailing list, it sends it to the first available list. You can send to the leaders from your AHG Account or you can create a custom list just for you with those leaders in it.