Why do the reports always default to the same dates when I have already set up the date range I want to see?

All reports default to the most recent date ranges. The date (or date ranges) set using the Options button in Reports sets the dates used for the report for only that single viewing. iChemoDiary does not "remember" that date or date range as a new default. To change the start date for a report, touch Options in the upper right corner of the report view screen.