This 100 ton Oceans issue was discussed awhile ago. Use the search function to read it.
What the NMC evaluator says is meaningless. The only thing that counts is the approval letter. It’s the official USCG statement of what you are approved for, and what modules you must take. The NMC evaluators make a lot of mistakes, some get corrected by supervisors, some don’t. Until you have the approval to test in your hand, you don’t have anything. Also, you have to take letter with you to the exam or they won’t let you in.