Can you find the script in your design report that does this?
Since you have FileMaker Advanced, you can enable the script debugger and run the script that way to watch it execute one step at a time. You can use the data viewer at the same time to examine and monitor the values of fields and variables during each step of the script.
No idea where it might be...can I just run any script without it actually firing off an email or something to that affect...from the looks of the design this is tied to more than one process.
If you have a button for starting this process, you can enter layout mode and double click the button to discover the name of the script it performs. (Click the specify button in this dialog if you see that it is set to "Perform Script".)
If you select Script Debugger from the Tools menu and then run this script, you'll be able to watch the script execute line by line and can halt the script at any point by clicking the red X button in the debugger dialog.
Thanks for the help on this one, I will definitely be posting more, I came from a sql background and this is all greek to me.