Pulse generated does not match the pulse requested (RasPi 3)

[yellowkazoo]

I have ServoBlaster (using servod) installed on my Raspberry Pi 3. I am looking at the signal generated with a scope that is calibrated and it doesn't seem to match what I am trying to set it to. For example I am setting the pwm output to 1350us with the command:
echo 0=1350us > /dev/servoblaster
On the scope I observe a pulse that is 1520us wide instead of the 1350us I am asking for. Is there a way that I can scale or calibrate this in the code?

Thanks in advance for the help.