you can edit the rain last 7 days in WD direct
under view, rain chart
and you can also edit the daily rain totals in WD there as well
there is a FAQ on how to do that on the WD forum
and also try converting the logfiles to data files (and then recreate the last 31 days data file (see under action)
then either wait for those client raw files to upload, or restart WD and then they will get updated and uploaded for WDL
what version/build of WD and what weather station type?