Please consider this a gentle nudge in the direction of proper usage. I am not angry with you, dear thing. Almost everyone makes the same mistake time and time again. But for your elucidation:
Editing is not the same thing as copyediting.
When you talk about making sure all the commas are in the right place? That’s copyediting. When you think about taking a red pen to a piece of writing? You’re probably thinking of copyediting. It’s something wholly different than editing-editing, and you should probably know the difference.