When I went to the “my stuff” page there were a bunch of random untitled projects with the scratch cat and one that was a poorly drawn circle.
I'm not sure where they came from, but I think it may be from those times I hit the create button by mistake and hit the back arrow.
If so, the circle is probably from the first time I tried using the scratch 2.0 editor, drew a circle, then gave up.

I never saved any of these and some say “unmodified” on them, why are these in my stuff?

Autosave. It saves it even if you don't save it yourself.

mitchboy wrote:

Autosave. It saves it even if you don't save it yourself.

This. I wish it didn't, though, a lot of untitled test projects get annoying.

Yes, they are a pain! But throwing away something you meant to keep would also be bad….

Once you delete' ‘em, they’re gone though.