Thanks for the report.
Hi, I have modified this behaviour in 0.9.2, which you should see pop up in Test Flight once Apple approves the release. The calendar widget was not actually updating as intended when the user changed Precision. The intent is for the scrollable Month row to not be visible at all, so it is only the year row and then the table of months below it. That should clear up the issues, and hopefully make sense from a UI perspective also.