Been a while since I used my VEXPro but there are only four “motors” available, the other 12 ports are “servos”.

From libquerk include files.

qemotor.h

```
#define QEMOT_NUM_MOTORS 4
```

also (for example) in qemotortraj.h

```
static void *TrajThread(void *arg);
long long m_trajectoryEndPosition[QEMOT_NUM_MOTORS]; // enc << posScale
int m_trajectoryVelocity[QEMOT_NUM_MOTORS]; // enc/period << posScale
unsigned int m_trajectoryAcceleration[QEMOT_NUM_MOTORS]; // enc/period/period
// Trajectory generator output
int m_generatedTrajectoryVelocity[QEMOT_NUM_MOTORS];
int m_generatedTrajectoryVelocityUs[QEMOT_NUM_MOTORS];
long long m_generatedTrajectoryPosition[QEMOT_NUM_MOTORS];
Axis_position m_generatedTrajectoryPositionUs[QEMOT_NUM_MOTORS];
int m_accIntegral[QEMOT_NUM_MOTORS]; // enc << posScale
Axis_position m_readPositionUs[QEMOT_NUM_MOTORS];
```

Also from qemotortraj.h

```
/**
* Initiate a motor movement with specified velocity.
* If the current motor velocity is not equal to the specified
* velocity, the motor will either accelerate or decelerate with
* the specified acceleration to the
* specified velocity.
*** @param axis the axis in question, either 0, 1, 2, or 3, corresponding**
*** to motor ports 13, 14, 15, and 16, respectively.**
* @param velocity the desired velocity, can be positive or negative.
* @param acceleration desired acceleration/deceleration,
* strictly positive value.
*/
```

So in other words, I think what you have observed is normal behavior.