Please note that the dates you select during report creation are for informational purposes only — they do not act as a filter that automatically adds receipts to it.
There are two ways to make sure receipts are present in a certain report:
Select a report before adding the receipts
If a report is selected when you add receipts, these receipts will be automatically added to the selected report.
You can select a report through the Reports tab (second from the right at the bottom):
Move existing receipts to a specific report
If the receipts have already been added to the app, you will need to move them to this report.
For more information on moving receipts, see Moving receipts.