WTH29

My m2 is shooting to the right.. I asked benelli what i could do to fix this. They said my gun was set to dx which is to the right.. They said i should swapt it to sx. Except i dont know what any of this is or means. So if anyone could give me some detailed discriptions of what the heck they are talking about i would apprieciate it.. THANKS

Can anyone tell me if the tg944d fits the M2. If not which one does... Thanks,