left click + right click = double right click

I'm trying to execute Mission Control using the double right-click trigger from the Normal Mouse menu.

Obviously, I think pressing the right click twice is a double right-click, but left-clicking followed immediately by right-clicking is also recognized as a double right-click.

Conversely, double left-click not only works with double-clicking but also works when right-clicking followed by left-clicking.

It seems to be a bug. Do you happen to know a solution?