Yeah its left or right as in sitting in the cab.

When your in side mode you should still be able to steer the cylinders all the way in but ive seen the adjustment of the RH cylinder being to short preventing the piston from retracting all the way. The poppet valve in the piston never opens for bypass and you wont be able to steer the LH cylinder in to its fully retracted position.

As long as the adjustment of the cylinder is good and the poppet valve was checked for good operation during the rebuild, you should be able to get the LH cylinder to steer straight if you keep steering against the pressure relief/steering lock.

If your thinking its just to much air in between the two cylinders combilift tech support should have a parts list to build a bleeder line that runs between the two hose fittings on the left cylinder to help with the air trapped in between the left and right cylinders but you would have to go through the support line as Richard_Irwin suggested.

I also forgot to mention when bleeding the system you should steer the cylinders all the way out and keep turning the steering wheel a full rotation or two after the cylinders are fully extended and do the same when you fully retract them.