I think there is a lot of variance in testosterone levels, that is why the range is so wide. Those look like good levels. Keep trying to get more sleep, less alcohol, more exercise, less stress, good diet and things should continue to improve. A good rule of thumb is that if you are waking up with morning wood, you are in good shape. Unfortunately the CFA program does not facilitate any of those. Same thing happened to me when I was studying for level II. Now that I am done, I have improved a lot.
On another note, I have joined the “no fapping” movement and I gotta say, that my drive is much stronger now.
Why does chronic stress lower T levels? I’m a big fan of looking towards evolutionary psychology to explain things, but I haven’t run across anything. How is spreading your seed detrimental while you are chronically stressed?