If you find that you have made a mistake, you can now duplicate sent reports and edit them. To do this, find the report that you want to edit in the 'Complete' tab of your job list. Swipe left on the job and tap the 'Duplicate' button on the right (highlighted below). An editable duplicate of this report can now be found in the 'Pending' tab.
You can make your changes to this report and send it again just as you would a regular report.