Am I too far forward on my shortboard when I'm paddling for waves?

Hi folks, I got a new board a few weeks back and I've been out on it a few times in waist to shoulder high waves. It paddles nicely and catches waves without issues. The shadow of my wetsuit has started to form on the wax and you can see the chest and the knee imprints. On take off when I get to my feet, my leading foot is roughly where my chest was and my trailing foot is roughly where my knees were (see the arrows in the pic). The board is 5'9 and I am 5'6, so maybe it is not surprising that my trailing foot ends up in front of the traction pad instead of on the traction pad. After take off I generally try to move my trailing foot back and thus widen my stance. If I try to position myself further back the board while paddling it just feels all wrong and makes me reluctant to experiment with a further back position.

What do people think? Do you change paddling position based on the power of the waves or always keep the same position?