certificate assistant – keychain access – certificate already exists error

Howdy, Posted this question in the web portion of the forum, but realize it isn't web related, So cross posting here. ----- Using the article on afp548 for rolling your own CA, I made significant progress in creating a CA. Unfortunately I've made a mistake (or three) and now am having trouble getting back to neutral ground. I have run into one issue which is that I made the mistake originally of creating the server cert (after creating the CA) as self signed. I further compounded that issue by deleting the server cert and its keys. When I created a newer server cert, as a leaf off the CA, I make it thru the entire process, but at the end it fails saying the cert already exists. Unfortunately I can't figure out how to back out of this corner I've painted myself into. I've rm'ed the certs from the keychains, and I've made sure they aren't in /etc/certificates, but still will get the same error. I've tried creating a new keychain, and still will arrive at same error. Any advice? Hints?