We had an 11 watt motor pugged in to port number 2 on our brain. This port had been fine all season. It began reading 15 watts on startup of the motor then decreasing to 5 at max velocity. This caused a decrease in torque to this motor. There is no issue with excessive friction in this area of our robot. When we switched the motor to port number 3 this issue was resolved. 24 hours later port number 3 began experiencing the same issue as port number 2. Any advice would be appreciated on how to fix this issue.
Does it only happen with this one motor? It might be a bad motor.
Firstly I want to clarify something that I feel affects the wattage of motors. Can you provide the code for the spin commands for the motor?
The commands you provide to the motor affects the voltage drastically.
This has happened with multiple motors.
What are the other ways to call a motor I am only aware of one.
Voltage, RPM, Percent, To Degrees, To Rotation, I forgot if there are any other spin commands but that is just a few. 
It ended up being an issue in our code where our coder accidentally was calling the motor group not just an individual motor for another motor. This meant when I (the driver) would try and spin the individual motor and i wasn’t holding the other button it would try and accelerate the motor and stop the motor at the same time.