What if you were revealed the techinques of Knowledge by someone Maharaji personally authorised to give them and then that person ex-ed or decided to follow Maharaji's brother Sat Pal?

Would you still have Knowledge?

Oh yes, that person gave K as a representative of M at that time. This is the problem, what if that person is now an 'unlit match'? M has said, in the past, that there is no 'unlit match' - he said that 'he never lost a premie'. So the theology is that if the instructor at that time was operating under M's agya, then whatever happens later is irrelevant.