How can I tell if a result was changed in my league as an official stat change by the NFL recognized by Fleaflicker or by my commissioner?

Whenever it says "Official stat corrections have been applied" it means that Fleaflicker made the change and is reflecting the NFL's stat change. Otherwise, it will show you that the commissioner changed the box score.

Note: In rare instances you'll see a stat(s) changed that was not made by the NFL or your commissioner. Here, it was an operator error on our stats provider's side that we internally audited and corrected. It will process on Thursday at 4 AM ET as well.