I looked at the wheel. The dealership did remove the weights and rebalance. I can see the new weights are in the same spot as the old. There is some left over white double sided tape where the old ones stuck.
The logic behind moving the tire 180° on the rim is to account for imperfections in the tire weighting. Beefy tires with large lugs are notorious for having a weight imbalance and sometimes will require repositioning on the rim during the balancing process.
This repositioning can be required with any tire/rim combination and is not unusual with larger tires. The larger the tire, the more likely the mass will differ over the tire area resulting in a significant imbalance.
Those less experienced or less concerned might just slap on more weight to avoid the necessary additional effort, just like your problem wheel.
Removing all the weights during the balancing process is a standard operating procedure (SOP). Any other method is substandard and likely to produce ineffective results.
As mentioned earlier and as a portion of your micro-management, take a picture of the tire at the valve stem so that you know where it's located on the rim and that it was moved close to 180° before they attempt to balance the wheel again.
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