Why on certain pages, even my homepage do I get an icon with an exclamation point on it and next to it is says, done but with errors on page?

You could have missing closures; a <div> missing the </div> etc.
Do all your images have their height and width and their alt?
Is all your meta information in place: tags, description/content and title?

Not much help, sorry, but that's where I would start