It looks like Windows 11 is duplicating your two extra monitors. Are both monitors connected through the same type of port, and have you checked Settings > System > Display?
Go there, make sure "Extend these displays" is selected under Multiple displays, check each monitor’s resolution matches its native setting, and use Identify to see that each monitor has a unique number. If it still shows double desktops, update your graphics driver through Device Manager or the manufacturer’s site.