Why do I keep getting team challenges?

Who appointed me a team captain? I don't remember volunteering. Not that I mind, but I wish someone had asked.

Doesn't everyone in the group get notified of all team matches?

I have been getting the first notification of team challenges, with the prerogative of accepting or refusing them. I'm never sure whether to do so, or whether I am even authorized to.

Presumably you are an admin (or superadmin) in the groups concerned.

Not to my knowledge

You are admin in at least one group, Chess Queens, didn't check further after I found that one.

Really?Okay...That's fine I guess. I had no idea.

Now's your chance, go ban somebody :)

LOL! I wouldn't know where to begin! I guess I should start paying attention!

Create some team matches yourself. Make the other guy sweat when she/he receives them.

It seems that you are a Super Admin in the Chess Queens group along with everyone else.  That means you may accept any challenge that comes to the group along with everyone else.  All Super admins and admins will get all team challenges and vote chess challenges that are offered to the team.   You all get the challenges and anyone of you may accept or deny them.  As long as you are a super admin or an admin, you will get them.  You also have the option of creating both team, and vote chess challenges for you're team as well.  

Okay. It's good to know that. I've been accepting or denying team challenges at my discretion. I've cancelled one because I couldn't get enough people to join. I haven't issued any so far. I am not sure how to go about doing that yet, but I'll figure it out!