I lost some muscle, but what I was getting at was that I didn't lose all that much relative to my body. I started with almost 208lb of muscle.
Wat? You lost 40lbs of muscle which is almost 25% of your total muscle mass. Of the 87lbs you lost almost half of that was muscle, for every pound of fat you lost you almost lost a pound of muscle to go with it.
You lost so much muscle because you were severely undereating and your body cannibalised your muscle mass for energy, which is exactly what I said would happen.