Thank you for the response...
1 - I don't use a wireless mouse. I found that with a wireless mouse, it sometimes leads to lagging between the click and the action. Thus, I went back to the "wired" mouse.
2 - This mouse is about 3-4 months old, not saying that it couldn't be an issue.
3 - I wasn't even touching the keyboard (the dog wanted in my lap so I was petting him and not even within arm's reach of the computer or mouse.