Need help bad.. Best HUB

I have a major issue with two days until competition. I have two small motors that I am using… One that controls the arm to swing from left to right and another for the arm to extend in and out. For the longest time (2 weeks) both motors have been working. Well, now one will work and one will not. Yesterday the in and out was working and not spinning… Today it is the spinning one working and not the in and out… I have my helpers check the voltage of the motors and wires. Nothing wrong with them. I have checked and double checked my easy c program and can see nothing wrong. Any ideas of what might have happen?

Thank you in advance,
NL Robotics