Dimensional error when cutting

I hope you can explain to me, look, I made a box and everything was done well and it turned out perfect, but I wanted to test my rotary axis to do tests with thermoses but when it came time to install the rotary axis it said to put a command which I put it and I already did my tests, then the next day I wanted to make another box that they asked me for and surprise!! The measurements no longer match me from then on.