I downloaded the latest version as of just a few moments ago (version 16.10.0) and the data is still mis-dated to the first.
Interestingly, I’m finding the problem exists ONLY with the date 2016-10-02. post dating it to the 3rd seems to work, but setting anything as the 2nd fails to the first. Backdating the 3rd to the 2nd also reverts to the 1st.
With v16.10.1, it doesn’t happen to me. Where I am, it is still October 2nd. I can enter a cash payment, cleared as of Oct. 2, and it remains as Oct. 2. So I don’t know whether this was fixed between v16.10.0 and v16.10.1, or whether this is something deeper related to time zone problems.
It is related to your current timezone change where the offset from UTC changes with daylight saving time. It makes it impossible to select 2/10/2016 because technically this day lasted only 23 hours in your timezone. I know it’s weird but I’m working on a fix.