“the rumors!” okay harry okay calm down
Louis doesn't know about ALL of the theories because we think he doesn't look for them. He just knows enough to be aware of the situation and be careful around Harry but if he doesn't like these rumors why would he search for it? There is no contradiction there. He saw on twitter some theories and it already bothered him so i really don't think he would go on the internet to learn more about it. And even if he knows some of them, we can't be sure that he knew this one.