Solar readings not graphing correctly

I have learned that 9 times out of 10 my problems are local config problems. But recently the solar w/m2 and % solar display correctly on the main page, but in the graph it spikes to 100 at sunrise and then drops and is stuck at -40. I have an ambient 2902a. Further complicating, the main computer also acts as a server and the client reading clientraw.txt (etc) does display the same numbers and graph the solar correctly. I have tried to make sure that I have all the settings set the same between the two machines. For the life of me I cannot find what I have screwed up. Also, running the latest build 99.

TIA for any suggestions.

Jim