There is no legislation that they're misunderstanding. They believe that the United States went bankrupt and was sold to pay is debts. And ever since then, the United States has fraudulently entered it's citizens into contracts with this private entity. Evidence for this includes your name being IN ALL CAPITALS on any official document, thereby indicating that the contract implied by that document is not referring to your "person" but to your "straw man", a trust set up by the United States for each of it's citizens so that it can collect their taxes to continue to pay it's debts.

And this is only the surface level weirdness. Watch Münecat's video essay about them. It's fascinating