It appears that there is a pricing mistake for you service.
AD1
72 0.01694118 0.1728
1 0.04023529 0.0057
2 0.03529412 0.0100
12 0.02764706 0.0470
24 0.19999999 0.6800 <<<-----------
I am not seeing this price on this miner... It may have been a temporary glitch, or a mistake made when setting up the miner for the first time (this is a new rig to the service). Regardless, thank you for your concern, and the heads up.
EDIT: Upon further review, we did come upon a pricing mistake. Thank you for the heads up.