Do you use rudder much more than you would in level flight or do you counter drift primarily using ailerons ?
Try and relax on the rudder. If you are up tight on that it may be making it harder to sort out the bank angle needed with the ailerons.
At your stage you need only think of the ailerons, elevator and throttle as the things to juggle on final. If the ball is a tad out forget it for now.
When you have the runway in roughly the right place in the windscreen (as your man recommends) then that is the time to level your wings. Wait a mo with the wings level and if the ruway pisses off again adjust your bank angle again to bring it back.
Gradually each wander off should get smaller until one day you will wonder what all the fuss was about