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In a perfect world if we could control all the links that link to our site we would have them link to the new URLs. However what I was trying to illustrate is that when you change your URL there is a method of making sure that the old directly which are going to be pointing to your older  URL structure  Wilburn point to your new URL  structure  via 301 redirect. Considering you are changing the URLs with links  e.g  example.com/old must 301 redirect to example.com/new

Its early for me and I haven't had enough coffee yet so I may be misreading things. Why do you have three sites on the same IP address with three separate mirrored WWW versions? As far as I can see... No reason you can't use Rel=Canonical to fix that issue though. If the code is going to be the same because of how they are mirrored then you'll have one site canonical'd to the right version and the right one canonical'd to itself... which shouldn't cause any issues. Can't guarantee that it will work in every instance though. Canonicals are a suggestion not a directive. So the bots will try to respect your tag but if they feel it is incorrect, improper, deceptive, etc. they can always choose not to.