Limited maximum intensity

I've got 4 Mac 550's on a hog1000 running v. 3.20. All 4 have been patched in extended mode (I need the 16-bit resolution for zoom and focus). When I select one or more of the 550's set intensity to "Full", the output only shows the 4 fixtures at 83%. Similarly, selecting one or more fixtures and assigning an intensity of 99% will display "82%" next to the selected fixtures. Any suggestions on how to modify this so that I can open the dimmer to a full 100%?

Another caveat... I'm not sure if it's related: when I view the patch by channel, my fine dimmer channels for each unit say "fine dimmer at 18%".
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