Brother, these strings that makers like Pierre make are one of the top dogs of strings. There is a lot of science to making one that is just a little quieter and faster than another of the same material and strand count. Twisting one to tight is one thing that will both affect one negetaviley, and the stretch is going to minimal. So while it is aggrevating, he is only asking you to take the extra steps to ensure you get the best from his product.
If you do not have a shot in string to measure correctly tell him and he will adjust accordingly. If you are not satisfied look at other sites that make these skinny strings. They have the same recommendations to ensure you get the best. Not all measure the same way but the best have ways they want it done. It is that particular of a science. Good luck and God Bless