Very interesting.  I have documented on this forum the past month how I changed my rate controller/guidance from a Viper Pro to a Pro 700 in my 4430 sprayer.  On Thursday I sprayed a 40 acre field that should have come out to 38.5 actual acres.  The Pro 700 only counted 34 acres.  I had recalled reading somewhere about how fence row nozzles impacted acre calculations (and my Climate Fieldview was mapping strange) so I disabled the fence row nozzles in the Pro 700.  Yesterday I sprayed a few quarters and the acres were spot on.  The fence row nozzles still work fine but they are not displayed on the Pro 700.

Edit to add....https://www.thecombineforum.com/forums/20-sprayers-chemicals-fertilizer/328081-cih-4440-pro-700-acres-wrong-help.html