I think it is just the terminology and understanding when using "BALL COMPRESSION" as it relates to the "COMPRESSION VALUES".
Let me try it this way.
Ball compression is a measure of how hard a softball is. The higher the compression, the harder the ball, and generally, the farther it will fly. Compression is measured by how many pounds of force are needed to squeeze two sides of the ball in by a total of one-quarter of an inch. If a test shows that it takes 375 pounds of force to squeeze the ball by one-quarter inch, the ball is certified as a 375 pound compression ball. So as the compression increases the ball is harder. 375 pound compression ball is softer than a 525 pound compressed ball.
So 525 is an increase in compression compared to the 375 pound compression. As the temperature drops the compression increases, meaning that 375 pound compression rated ball ball gets harder in cold weather and the amount of compression will be higher with the same ball that was tested at 72 degrees. I believe the numbers for every 10 degree drop in temp relates to 60 more pounds compression increase to achieve the .250" squeeze