Where did you take it? I've not done IVA but did 5x SVA's all at Nottingham, found the guys there great, they seemed to have the attitude they wanted it to pass & would use judgement, whereas heard stories of others that were strict with no leeway.
But as said a good fail, you have a list to work from, they should only test what failed on the retest, unless you make big changes, once heard of a guy take a car back for retest for a steering issue, I think it just needed the lock limiting. But he decided to swap out the mirrors & remove the repeaters, then wanted to argue that they had already been tested before & shouldn't be included on the retest.