Is the pain mostly in your left calf? If so it is a pressure point caused by the crease pressing into your calf.
Knee pain is more caused by the banana curve of the hammock(still a very slight amount of that even on the diagonal with most gathered end hammocks) causing your knees to be without enough support, allowing them to bend in the wrong direction. Calf pressure gets my attention very quickly, this other tends to be noticed more through the night with the better hammocks, if at all.
Cure for both( at least for me) is identical, a small pillow/sack under your knees to support them. This also raises your calf enough to negate pressure. You may have to experiment to see what makes the most comfy item to put there. Even a leg pad helps a fair bit. As well as, for many folks, experiments with RL length and/or how tight you hang your hammock.
Your weight would be supported with ease with a single layer 1.7 or a dbl layer 1.1, but I have no way to know if either of those would solve the problem. I have heard that the 1.1 single does, but you need more than that.