That’s expected. To be clear, sending a command to an Item does not change its state by itself.
Normally a binding does something to a device, the device responds eventually with a new status and the binding updates the state.
Autoupdate is a shortcut to that - acting like a binding, it listens for commands and guesses what would be a sensible state for the Item and issues an update. That update may or may not take place while any rules triggered from the command are started or still running.
So autoupdate=“false” means the Item will never change state unless the binding does it - or a rule updates it.
Maybe you need your “All Blinds” rule to do those?