ESC'S programming and calibrating problems


#1

Hello all.
I have a 2.5 ROV. I assembled, I programmed ESC's, I calibrated, I did tests on land, then I did on water tests.
In the water tests I noticed that Starboard starts faster than Port engine and spins faster.
Because of this when I was giving the order to go forward or back ROV was spinning in circles.
I opened ROV and tried to program the ESC's again.
When I tried to calibrate, Only the Port engine I have managed to calibrate. Vertical and Starboard start until I finish the calibration.
I tried all versions of the ESC's programming, but I have always the same result: Vertical and Starboard start until I finish the calibration.
What could be the problem?
What can I do to fix this?
I look forward to your responses.
Thank you and good day to you.