one domain twice in serps, possible?

Just noticed something really strange while checking google serp.. I found that my site is listed twice on a specific keyword. Once on page 5 and once on page 7, identical to eachother..

Example:

Searched for: My Domain

Result on page 5:
Title: My Domain
Description: this is my domain
Url: xhttp://www.mydomein.com

Result on page 7:
Title: My Domain
Description: this is my domain
Url: xhttp://www.mydomein.com

Checked a few hours ago and now, still the same.. ctrl+F5 still the same..

Is this possible (well, it appears it is, but should it) ? And I see potential hurting comming up for duplicate content..