In Buddhism, there is no absolute right or absolute wrong, it is just the difference of perception and understanding. Inside a Dharma teaching, there are 100 students, Dharma teacher is the same, but after the teaching, the 100 students will have different understand and the reason is their understanding is based on their background, education, personal experience, etc
But it doesn’t matter of how you understand it, as long as the teaching helps you to practice Dharma with the correct mindset. Not to mention about different, even just ourselves, when we listen to the same Dharma teaching again after 1 year, we will have different point of view also, because we had experience different things and therefore, our understanding followed to change also.
So the master tell them that they are correct is because of their different understanding level.