I asked about your TA and CH because I was trying to see if they were very high and contributing to the cloudy water issue but they are fine. (You are right that calcium is not needed in a vinyl pool.)

Have you been shocking the pool and maintaining high chlorine the entire two weeks? For a CYA of 70, 8ppm is not shock level.

Have you been running your pump 24/7 and backwashing as needed?