Email addy and nick need to be the same, I think. It doesn;t automatically allocate just becuase the email addy is the same.
Just beware of changing team numbers, everyone: if you change your team number in just ONE solitary cow accidentally, and it's a HIGHER number, trhen ALL of your points from ALL of your cows will go to that team. A few of us accidentally did this when starting the Oz FAD team (OCAU), and worried a few here at TIMO for a short time.
The best way to be safe with multiple networked cows is to run a single queue server, IMO. Then you only have one single setup control panel to get wrong.
Cheers
Mick