Steelseries Rival Users

Hi couldn't find anything on the google machine so I figured this was the best place to post about it. Recently started playing league again and I picked up a steelseries rival in the process. I've been playing counter strike so I was using the left clicks a lot more and I found it to require a lot of pressure to press down. When I started playing league again I noticed that the right clicks are noticeably easier to press and require minimal pressure. Im wondering if anyone has the same experience or if I have a hardware malfunction. Any feedback is appreciated.