Interesting. I guess we all have our idiosyncrasies.
With regards to feet, I should have noticed this, but there's a perspective issue. If you look at the mat borders, they're coming at you slanted, but they're pointed straight at the camera. So if your feet are pointed straight, they will still look like they're pointing out slanted. The angle of the camera makes your feet look more pointed out. I think... Instructors? Am I correct, incorrect?
Early extension problem. Got a lesson from instructor, will work on the left knee.