jab/cross

I used to think that the jab was supposed to come half way across my body to my centre and my cross to the same place but now i throw it more straight just to the left of my centre with my cross coming just past centre to the same spot.Am i doing it correctly? Hopefully this makes sense:confused:

I was taught that aim through stuff many a moon ago,after 31 of doing it though,its strictly a visualisation tool to get you to drive your hips in to the punch.Its in your head.If you put your hips in to the shot,just aim where you intend to hit.