very good wheels are pretty well balanced, & better tires are also pretty well balanced... usually the tire valve is the heaviest point on a wheel if the rest of the wheel is symetrical & perfect, especially with a tpms sensor, so tire manufacturers put a dot on the tire at it's lightest point, & when the tire is mounted then the dot should be lined up with the valve to get the best tire-rim match before balancing... good wheels usually won't need more than an oz, maybe 1.5oz..., 2 even, once you start hitting 3 it's like hmm... 3.5-5 is like ahhh, not so great of a wheel assy really & a bit of a disapointment...
when you start getting to over 5oz at any one point then that's not a very good wheel assy OR the balancer just has issues... if they didn't match the tire to the rim this can cause excess weights needed, but even so 5oz & better is not so hot... do you have tpms? that can add an oz or 2 to the equation too... if you have weights all over the place then the balancer just sucked more than likely, weights should be in one spot on the rim with a good wheel assy & a good balance, if your seeing weights oposite weights then the balancer was just grasping at straws doing the balance... also noticed that the bars extend in to the wheel & limit weight placement, so if the balancer just stuck them next to where they should go he'd be there all day adding & adding everytime he added them in the wrong place & spun it up again, which is probably the case here most likely...
just as a reference, a good set of 22" wheels with a good set of tires I balanced recently took 1/4 oz one wheel, 1/2oz the next, 3/4oz the 3rd & 1 1/4oz the last, & I was pissed that the one took over an oz... factory cast wheels that are not tire matched correctly when mounted can take 3-5 oz maybe... more than that is just not right or a defect somewhere really, either tire or wheel...