Looks as though this may be addressed in Beta 2.0 release
# P59. There are some reports that the WMR200A does not download all of the data to Virtual Weather Station. I have not been able to reproduce this, but I added a feature where it displays the first archived data point, the most current live reading, and the current record being downloaded, so we can troubleshoot this issue. This is under the WMR200 Sensor Communication window.
# P60. Continuation of the effort in P59. If you closed the WMR200 communication window and reopened, the archive records would not be updated.
I suspected it was due to the screen saver coming on or some other program interupting the download. In any event it should not zero the weather station if the tick box for such is not ticked!!
Will update this note if Beta 2.0 still does this.