Sorry to hear you are having trouble.
all my computers are set up with a left handed mouse option but when I go into the screen of a remote computer it swaps the keys round so I have to use the mouse as if it set up for right handed when it is not
MP simulates keys / mouse on a Secondary based on input sent from the Primary. So to get what you want, you would have to set the Primary to 'Right' for the mouse buttons, but leave the Secondaries to 'left'.
Stardock Customer Service Manager