Complex sentence: In 1957, Taylor, annoyed at having to replace films that were still making money with new releases, put a different show in the "Little Elgin" so that two films could be shown at once.
Split into simpler sentences: In 1957, Taylor became annoyed at having to replace films that were still making money with new releases. He thus put a different show in the "Little Elgin," so that two films could be shown at once.