No problem, it's been a while since I played the game but I don't think any moves use the Right Bumper. Which move are you not sure about? The only one listed in the first post with R is the quickfire wrist dart, which is pressing the Right Trigger twice in quick succession. The other ones, such as the quickfire electrical blast require you to hold down the Left Trigger and press the other button specified. Those ones can be done at any time.
Hope this helps.