Tanisha Verge

I like the show but it doesn't make sense. The 1st few episodes don't add up. How can an contestant win 50,000 when they have more than one bad singer? Like if there were more than one good singer she would never be able to pick a 'bad' singer 5 times to win 50,000 guaranteed for ALL 5 rounds. They would need more singers. Example, one episode 3 theres was more than 3 singers so how would she have EVER won the 50,000? My thoughts while watching.