Does anyone know when a gallon of paint became less than a gallon? What I mean by this is that I recently was going through my supply of paint and noticed that the volume ranged from 122oz to 126oz, instead of 128oz. Also, I just purchased a "quart" of Behr that was 29oz instead of 32oz. Might this be room left to add tint? Or are we getting bamboozled?

As a side note, I am a connoisseur of ice cream, and I know that it has been 10+ years (maybe much longer) that a 1/2 gallon (2 quarts) was really 1.5q to 1.75q.

Just curious...