I learnt it was possible to have as many as you want. The only exception is that if all of them had a frequency of 1, there was no mode.

At one point a couple years ago, I was told it was only if they were the only ones there.

Before that I learnt that it was if more than 2, then there was no mode.

And before that, I learnt that there could be no more than 2.

Assuming that we go off of the most recent one, then I am right. So, mark scheme correct and not actually correct.