Take a look at your weights as they are now. If there are 2 or more next each other it could be that you have a "hot spot". By that I mean a heavy tire spot piled on top of a heavy wheel spot. If this is true you will see several weights clustered together, often on one side of the rim, not both inside and out. The guy doing the balance was too lazy or untrained to bust down the tire, rotate it and then rebalance it so that the heavy spot on the tire was opposite the heavy spot on the wheel. In the old bubble balance days this was a normal fix.Today's "computer" balances are fast and easy, with little regard to such issues. They just pile on the weights to get the "computer" to say all is ok.