High rainfall on Real time graph error

WD v10.16h WMR968
Real time graph failed to display rain over 2 inches. The graph displayed 2 in. rain then recorded 1.9 in. rain. The total rain for the day was 3.9 in. The WD main screen displayed the proper amount as did most reports.
See:
http://littleswitzerlandweather.info/img/rain20040831rtg.gif

Has anyone else seen this?

ah, i need to add an auto scale then…(if over 50mm)
i will look into that…

ah, i need to add an auto scale then.....(if over 50mm) i will look into that...
I recorded 98mm in the old fashion glass rain gauges in less than 4 hours.

No particular weather system, just a lot of moisture being squeezed out of the atmosphere over the mountains. One small tight cell.