I once saw an old oil production contract that described the volume of a barrel of oil as 'A good measure and a good measure more'. Someone had written in 'one bl=42 US gal' and there were a bunch of initials all around it.

A smart Lawyer can make a contract say whatever they want it to say, and the law here was likely composed by Lawyers in the Lege.

I was told there were contracts that identified 'a good measure' as 40 gallons and 'a good measure more' as two gallons, so perhaps this was common at one time.