Averages/Extremes files incorrect - how to correct?

Hrmm…I’m still really struggling here.

I followed this FAQ to the letter…

http://discourse.weather-watch.com/t/27619

After I enter new rainfall data for a day, i click “use the correct amount” and then “Save changes”.

Once I do that, if I then click “Load the graph data file to correct that” again, my changes are not there.

What am I doing wrong?