It will probably work fine as long as you are willing to have both kits at cas 10-10-10-27. The 8GB sticks might not want to run at the tighter timings. That's probably a misprint on that website showing them at cas 9.
I was just looking into memory maximum for win 7 home is 16 gb so ill probably stick with that...and get just another 8gb kit(the same as i already have) due to the 90$ charge to upgrade windows and then another 110$ for the ram i might aswell just get 8gb for 50$ and get a bigger and vaster ssd with the prices dropping as fast as they are. Thanks for your help