rearend alingment HELP!!!!!

Maybe I'm not understanding this problem because I'm reading it and not standing in your shop lookin at it. It's okay for it to be off to one side a bit, the driveshaft shouldn't be a straight shot from the trans to the yoke, it needs a little bit of an angle to keep all 4 u joint caps turning. This is what I've always been told and have read but like I said maybe i'm not getting it just by reading it.