Thanks for responding t-4-2. That was what I first tried but removing one removed all the duplicated accounts!
I am using WLM 2011 amd by the way when I open mail, on the left hand side I only have my original two accounts listed? The extra ones are only found in the e-mail accounts list but it does use all of those when collecting mail and when sending - the latter causes it to freeze when it tries to send mail again! If you have anymore thoughts please pass them on as I'm kind of stumped!
Thanks to Roncerr for your suggestion and I tried that but it didn't work.