Right. You can open more than one CoH account under the same Plaync account, and use the same credit card for both.
Quick Tip:
Send yourself a Refer-a-friend code from your main account, and use that number to create the second account. That will give your main account some free time once you subscribe to the second account.
Many thanks, all I need to know 
Just curious, if I'm going to sign up for a second US account, does anything apart from my login name need to be different, I can use the same credit card, address, email address etc. can't I?