You absolutely should have a chat about this with your instructor and he needs to clear this matter up for you. It is his responsibility to do that and if the matter has arisen already in a briefing with an examiner and has caused confusion then your trainer should have broached the matter with you, either then and there or later, and removed the grey areas. He should have enough empathy with you to realise that you're not a happy bunny. Since he has apparently neglected to do this you will have to bring the matter up but do not relent until you are 100% sure both in what he says and that he is correct in saying what he does. Get him to show you the writing in LASORS or wherever it may be concealed. At the next briefing, if the matter is raised again, do not hesitate to quote your instructor, in front of him, to the examiner and make quite sure that there are no ambiguities on the horizon.