Maybe it was in the delivery? Supervisors and managers are paid to establish what sort of personalities their workers are and how we take supervision and training. We are placed into personality types. Sounds unfair but it's a fact of life, it's done to enable supervisors and managers to know who and what they are dealing with so that in training they can adapt strategies to train every person to understand the same way. In doing this they may have to train you with a firm hand yet someone else with a delicate hand, get me?

If we have already made clear what we thought to the supervisor there is no need to go further because you are hammering home to them that you still think you are right when you are not right (that is how they see it and hear it). There is no need to continue to try to make yourself heard or understood because it is a moot point; you were wrong that is it end of story (as far as they are concerned).

Point being that you have an obsessive need to go over your story again and you are subconsciously giving them one more opportunity to say "AAAAhhhhh yes you're right".

Let it go and work on why you have the need. It is possible that something happened when you were younger that either embarrassed you beyond belief, or a situation where you were right but were told you were wrong has caused you to feel the need to explain yourself ad nauseum creating an anxiety reaction in you so that you now need to continually exlpain yourself to be certain, which allays the anxiety but creates an uncomfortable relationship between you and others; vis "people don't get you".