By looking at the heat discoloration of the steel sheet it clearly looks like the torch height control on your MultiCam machine was not maintaining proper torch height. The Powermax torch needs to maintain .06" from the metal while cutting to maintain cut quality and penetration. The height controls function is to do this to compensate for warpage of the material, of for debriss buildup n table slats that will cause unlevel plate.
1. I suggest reviewing the operation of the torch height control functions on you system to ensure it is working correctly. MultiCam has a good tech service staff that can help you.
2. I also suggest that for 16 gauge steel you use a lower output power. For best cut quality switch to the Fine Cut consumables and follow the instructions for settings (speed, torch height, amperage, pierce height, pierce delay) that are in the Hypertherm operators manual. You cut quality will be much better. 80 Amps on 16 gauge will provide great cutting speeds but horendous cut quality.