Should I have to pay for HVAC Technician to draw nd weigh refrigerant after he put too much refrigerant in sys?

must be a small system to only need that much...typically the nameplate says what the proper charge is which normally includes up to a certain length of copper tubing,usually 15-25 feet..if copper tubing that connects indoor and outdoor units is longer than that,the mfr calls for so much per foot extra refrigerant..also if a aftermarket drier was installed in the liquid line,they can hold several ounces of refrigerant extra,also the gauge hoses used for charging the unit hold a few ounces,depending on how long they are,,so the total could have been over 3 lbs,and of couse they always "round up" when it comes to the bill.....puron [r410a] units are different from r-22 units in that its more important to do everything by the book as far as evacuating,changing driers,using nitrogen purge while brazing,and getting the refrigerant charge right...if unit is overcharged,it could cause a problem,but it depends how much overcharged..thats why its good with these new systems that take puron to doent all pressure and temp readings on the reciept after repair is complete.....why was this repair even done to begin with??..was there a problem before that still exists?............... .......****added...ok,i havent seen many 10000 btu units but sounds like you have a legit complaint... some times the older techs are used to doing things a certain way and dont adapt to the new sytems...for someone to put in 64 oz. when nameplate calls for 37oz [plus a couple oz. for hose[s] used to charge unit if its charged with liquid] is negligant.........that much extra puron would cause the high side pressure to go way high,probably causing a high pressure switch to open,shutting off compressor,therefore the cool [ room temp] air....the smaller the unit,the more critical the refrigerant charge is...if you overcharge a 5 ton unit that takes 15 lbs of refrigerant by 1.5 pounds,probably wouldnt make that much difference,whereas overcharging your unit by 1.5 lbs [ one point five] causes a problem...you shouldnt have to pay obviously,hopefully the technician / company will do the right thing and correct the refrigerant charge under warrenty.....