There are 2 at least Bands with the name "The Mistakes"
1.The Mistakes are a very powerful & experimental band with the following members:
Henry Kaiser - Guitar
Mike Keneally - Guitar/Keys/Voice
Prairie Prince - Drums
Andy West - Bass
see more information on the band and their CD here:
http://www.keneally.com/discography/mistakes.html
2. A Garage Rock Band From Fort Worth, Texas.
Their best known song is called "Time Is All" Released In 1966.