texasville - 3:45 pm on Dec 15, 2005 (gmt 0)

tigger-
>>>I've just done a search "www.myurl.com" and the non-hypenated site is now showing pages from the hypenated site which obviously don't exist and have never been on the site! so if you click on these results no page is dispalyed and a 404 comes up <<<

It may be due to inbound links. If they are truly similar in name then some webmasters ading your links may have dropped the hyphen.