I can see two possibilities for why this happened.
1) the stage managers didn't give the inserts to the ushers.
2) the ushers in your section didn't stuff the inserts into the program.
The easiest way to avoid this sort of problem is to make an announcement as well. Most producers don't like doing this because it starts the show off on a low note and many audience members are immediately put off, when an understudy announcement is made.
In any case Hydzyk and Cavenaugh are each entitled to 1/8 of their weekly salary. Hopefully the Equity Deputy in the company is on top of the insert situation and has informed the Company Manager of the problem.
"Just a Guy. Your feelings are touching. I am gladdened by the thought that you will one day wind up 6 feet under as we all do." - MrRoxy ------
"I do not suggest you walk out the door onto a New York street with your vulnerable child part exposed and not protected..." - Jason Bennett