WarcraftRealms.com

One more question is; I play for two days and upload on the second day do I lose the previous stats from the previous day?

This is for CensusPlus

I have seen this on other data collectors where they auto upload their data after exiting WoW. Can you code this? I think a lot of players like myself sometimes forget to upload after playing session. Also is the file updated after every game play session or is it overwritten at each log in?