Mmmh,

90 min. endurance training *might* reduce muscle growth, that's what I have heard actually. How about swimming for a shorter time, but with higher intensity, like doing interval training?

Concerning LC: Friday's advice is very good, even I follow a different way. But I seem to be the only one here who is doing striktly LC during the week and adds a carb loading day on Sunday. I would choose one option and stick to it for a few weeks (with shlight modifications, if necessary).