Did you use your release when you drew you bow ? If you pulled it back with fingers sometimes you twist the string and it can come off the track on the cam and cut the string .String is about 5 years old, bow is kept in climate controlled house, not in a shed, D loop with a release, The rest of your questions are answered in my original post as that is exactly what I told them to do to it. They called and said it was ready, I got home, pulled on it a couple times then started shooting. They did put wax on the string so it seems they would have noticed any issues. But the bill only said tuned bow. But I was explicit when I told them to go over it with a fine tooth comb.
Just a thought.