Bests & Worsts Reviews from Amazon

In dealing with home exercises for treating a shoulder injury, I purchased this set for the price and good reviews. They were packaged and delivered satisfactorily. The stand went together fine and is sturdy enough considering the price. The big HOWEVER is that the weight and grip sizes of the pairs do not match each other! Two pound: 2.25 pounds and 2.1 pounds. Three pound: 3.2 pounds and 3 pounds. Five pound: 5.3 pounds and 4.6 pounds. I will keep these and switch them off between sets I guess. I can't imagine what the quality control folks were thinking. Maybe they don't exist?