I just ran about $100 in bitcoin through the joinmarket tumbler script. I used all default settings. (No extra switches) When the script finished, i added up the coins the script sent back and have discovered that i only received 84% of my coins back. I expected to pay some fees and such. But 16%?? I mean... people on the internet complain to the end of the earth about the 3% fees they pay to Helix and/or other well known tumbling services.

Did i do something wrong? Or is 16% in fees par for the course?