I created a page as a template .dwt and when I create an editable region for a cell it shifts the grid to the right in Design view but displays correctly in Live view. I remove the editable region and the grid is back in place. Any fixes for this?

Hello,
This is a dreamweaver design view rendering issue and not a problem with the extension.
You can also take a look at our Bootstrap 3 Extension for building responsive layouts: www.dmxzone.com/go/22360/dmxzone-bootstrap-3