I can't imagine an option to overbill you ;-)
I would suggest calling it in.
I made a test on suggested software release (FFPS: 93.G0.85A, IOT: 1.204.108/25.12.33) but the results are the same - blank pages are counted as click. Maybe there are any specific option which should be set?
The D110 FFPS spar version is 93.G0.85A General release is 93.E2.21CB
The D110 IOT spar firmware is 1.204.108 General release is 1.204.9
I can't link either one so you would need to call in to get them from 2nd level (The FFPS is sent via DVD to your location)
When you call in they would certainly know if the issue is fixed in a spar, or if there is a simple setup in config to resolve.
Is there any chance to do not count blank pages in job on machine (D110 with FFPS) counter just like it is done on DCP700 with FFPS (82.B2.04D.86)? Any special firmware or set option?