I just replace them, but I am sure you could re-shim them if needed, they simply wear over time. It wouldn't take much to tighten them, perhaps one shim, but if they are binding you could try taking one out? I doubt your has the issue, more likely the sensors are different. The original sensors are much better quality, similar to the AFM, the original ones are lasting 10-15 years and the replacement parts are failing after a short time. Made in China now?
If it starts ok with the crank sensor disconnected, the sensor isn't aligned on the flex plate properly.
The cam faults may be a separate issue, especially if they weren't throwing codes before you changed the sensors.