Do you skip rounds if you interview with different business units all at once?

I am interviewing in the middle of vacation season with a few companies who told me each it will be 5 rounds.

All the positions are very similar senior positions in Commercial Banking so the interview structures are almost identical. I am noticing some of the companies had me interview with 3 different positions I would have regular interactions with on a daily basis.

Is this natural to assume that I am skipping rounds because I have no idea how you will stretch the process to 5 rounds after interviewing with 3 people on round 2?