18 from the same CA?! Insane.
Did the collections pop on after or before they signed for it? Maybe I missed it, but was the dunning letter for one account or for 18? By law, they must send 18 individual dunning letters.
A few folks might strongly disagree with me, but the FDCPA clearly states that you have 30 days to respond to a dunning letter. After 30 days, all bets are off (assuming you got a letter to begin with). I also agree with others that placing a CA acct on your CR constitutes collection activity. Therefore, adding a CA after they signed for the DV but before they responded with a DV response is illegal. IMO.
Who was that CA again?