For my own curiosity, what makes them stand out as fakes? I couldn't really see any real differences.
You can go to the example list (LINK) and click on the X buttons on the right and request a deletion providing your reasoning in the bottom field on the request form.
The first one is described as a Forgery. “This particular banknote is a forgery, which means it was illegally printed or altered to resemble genuine currency. In 1919”