Complex sentence: Ensminger was not credited on the album (which he preformed on), instead, Ensminger's replacement Mike Oliver was given the credit for drumming on "Committed"; the spot of lead guitar was filled by Jasan Stepp.
Split into simpler sentences: Ensminger was not credited on the album (which he preformed on). Instead, Ensminger's replacement Mike Oliver was given the credit for drumming on "Committed"; the spot of lead guitar was filled by Jasan Stepp.