Problem.
When the Ohio and the Mississippi come together at K-ro Illinios the Ohio is the larger stream.
So, technically, Mississippi should be named Ohio or WVA. The State of Mississippi would become Ohio II or just known by its' zip code. The more major watershed originates somewhere upstream of Pittsburgh.
The confusion this correction would cause is more than justified by the righting of a centuries old injustice done to the Ohio River (from 6 mos to 13 yrs I lived on her banks). I'm in favor of reparations.