They can add to the original list. Really they shouldn't, as the inspectors should be consistent, but they aren't. Seb with his 31 has had way too many inspections than he should have, and no matter what he fixes they keep "finding" other stuff so it's dragged out way too long I know his pain!
Overall it doesn't really matter what pits you go to, as the inspectors can be doing shifts at different pits. The good & bad things is just chance really, as your experience will come down to which inspector is doing your examination.