I only run into this odd behavior on one Blender project (Anvil Tutorial), and my other projects render correctly (single rendered image).
I have looked as carefully as I can at the settings, and they seem identical on each project. Only the Anvil wants to render over and over.
Is there some hidden button that I may have accidentally checked that could cause this behavior? See my render settings in the image --
I would appreciate any information on this. Thanks for helping a total noob who is trying to learn!