[Bradford] Double bubble

[Devo Too]

Aren't I lucky? Every time I write to the list I get two copies, not 
one, of the email I just sent. A short while ago there was no sign of 
two logins on the list, so I unsubscribed, left it for a while, then 
resubscribed. Just to see what would happen.

Since then Steve has responded to my thread and I got the one addressed 
to me directly and the one to the list, but only one of each. That's an 
improvement because the list had been sending me two of everything. Now 
it's only sending me one from elsewhere but two confirmations, to add to 
the copy already in the sent box.

Can anybody explain this? Does it happen to anybody else?

Cheers,

Mike