I'm using the camera app to shoot. I go into GP and use the little pencil tool to edit. When done editing, I hit save and its just creates a copy in a folder titled PhotoEditor, therefore, having a duplicate... This is so strange.
Edit: this happens with all forms of editing; cropping, applying filters, etc.
I just did that exact think and mine behaves like iPhone, and I don't have a folder called PhotoEditor on my phone. Are you clicking the image thumbnail in the camera app? or clicking home and going to GP icon? I think the thumbnail in the camera app is the Samsung Gallery app, not GP.
EDIT:. yep, that's exactly it. I just redid that same workflow but used the image thumbnail in the camera app, and it took me to "Photo Editor" and used Samsung's photo editing software. Then it created a folder called PhotoEditor.
so, don't use that image thumbnail. Go directly to GP and edit there, not the camera app.