Complex sentence: Steve Cheese was fired from the band shortly after the recording because of his unwillingness to tour outside of Chicago and was replaced by Aaron Cometbus for two shows who then was replaced by Brian Vermin.
Split into simpler sentences: Steve Cheese was fired from the band shortly after the recording due to his unwillingness to tour outside of Chicago. He was replaced by Aaron Cometbus for two shows whom then was replaced by Brian Vermin.