The Analytics tool in DTM will fire an Analytics s.t() (Page Load) beacon on each page by default. You don't need a "blank" page load rule in the rules section. Each rule in the page load rule section just modifies that default beacon. If you have a rule that isn't making any modifications to the defaults set in your tool, I'd recommend removing it. As always, be sure to test this in your staging environment before deploying in production.