My left orbit and horseshoe both always go cleanly to a flipper. My right orbit used to hit the rubber next to the spinner and go down the middle, but I bent it out a bit and now it goes to the left flipper every time.
3 Bank and slings are deadly on this game, but they're supposed to be, not much you can do about it.
Have you made sure both the orbit guides are tight? If not, tighten them. If so, bend them a bit to try and adjust where they head.