Ok, some notes and questions.
As mentioned before, i have the VRef set to 400mV, which with my chinese a4988, should equate to 500mA of current. When the motor is powered and idle, i'm measuring 450mA for one coil and 0mA for the other. So the total mA is correct, but i'm confused about the actual results. Is only one coil receiving power? I cannot physically turn the motor shaft with my hand, so it's definitely getting power.
Another thing i noticed is when i put my multimeter in series with a single coil wire, normally i put the red wire of the multimeter on the driver-side, and the black/COM wire on the motor-side and i would get the reading of -0.45A. However when i switched red and black wires, it would drop to 0 amps, and then the other coil which normally gets a reading if 0A, then will have the reading of -0.45A. Is this normal behavior?