To all those authors who received a second copy of their Daily Summary Report this morning, my apologies.
Yesterday I made several changes to the backend code, and this morning I wanted to perform a test run to ensure all the report emails would be generated correctly. Unfortunately the DEBUG setting used in the configuration to normally do this wasn't set (DEBUG disables the report sending). As a consequence it performed a live run instead, repeating the same emails for the original live run. In order to avoid this in future, I've added a better command line switch so I can forcibly run it in DEBUG mode, so it shouldn't happen again.
On a positive note, all the emails did appear to be generated correctly and there was no local errors, so at least the changes worked :)