Razor Mamba back button too sensitive (one click goes back 2-3 steps)

[Pummel]

Hello,

I have a Razor Mamba mouse for several years now. I am using Windows 8.1.
For some reason a few days ago, my mouse started behaving really strange when I click the back button on the side. When I click the button a split second too long, it goes back 2-3 pages when browsing, rather than just one step.
Before, I could hold the mouse button down for as long as I wanted, and it would only go back 1 step.

 

[erykkrol]

Check the razer software, maybe there is some sort of Macro associated with the button.