Interview with winner referencing something odd?

[In the interview with the winner](https://www.netflix.com/tudum/articles/the-mole-season-2-winner-interview), they say something that stood out to me.

>Then, during the swimming challenge, me and Muna took $5,000 out of the pot secretly by ourselves. She told everybody about it and I was like

Am I misremembering something? The only thing that I can think of as having a swimming challenge would be the raft challenge. But I don't remember the event in question happening. I can't even really think of any instance in the season happening that is close to that. Am I just forgetting something?

Does this imply there are more challenges that happen offscreen but that we don't see? How is that factored into the final pot?