Try Swaping your naga over to numbers(1,2,3 etc) over the num pad numbers.
Iv had issue in the past sort of like this. Iv not ran into this on XIV thou. I use a Naga and have a few of the num pad buttons as a hot key on my nage. Thou ther not the numbered on its the num / and num * both of these work as well as wit shift+ and crl+ These are the only two i use on my naga thou that are on the num pad keys.