Please explain how this invoice works

https://imgur.com/a/u8hFnE0

How does this result in a balance of $860.55? Thankfully, the charge actually ended up being the $573.70.

But that's still double the charges shown ($286.85).

My wife had shared a room with a friend. Do hotels actually split a bill sometimes? This bill just makes no sense otherwise.

It's a Residence Inn in Berkeley CA.