I was able to figure out the solution to correct the data using this thread.
http://discourse.weather-watch.com/t/70741
To answer your question about “loosing settings”
This has happened twice. If anything with my USB ports gets changed around (I’m careful to make sure my USB-serial goes back into the same port for my weather station) it seems my weather display gets confused on which port to use. This causes me to go back into weather display pick the correct port and weather station. It wipes the settings out, then for whatever reason also the max-min weather data goes wonky.