Hi, unfortunately that's how Macro keys work for this particular keyboard. I'm afraid there's no solution to this matter.
Just for reference, you can visit the keyboard website https://www.ttesports.com/Keyboard/336/Challenger_Prime_V2_/productPage.htm?a=a&g=ftr#.X07vk9RS-70
or if you have any other question, please feel free to let us know, thanks