Validating my site: What are these errors?

[insats]

Im validating my site atm, and have come across these three errors (http://validator.w3.org/check?uri=http%3A%2F%2Fwww.loom.nu%2F&charset=%28detect+automatically%29&doctype=Inline&group=0)

What should I change? I don't know much about Doctypes.

[icio]

You have 2 doctypes and 2 html elements. Don't.

ie, there should only be one of each and they should both be at the top of the document