Posts are overlapping

Well, you’re missing all the standard code WordPress code in your header.php from editing it incorrectly, and you’re duplicating div’s in CSS, and so you’ve got multiple code problems. So I’d start with checking your edited theme with an unedited copy of the theme you started with. See [Invalid]Markup Validation of scribblerportfolio.com – W3C Markup Validator. Scroll down in the validation report to see line numbers and source code.