Complex sentence: In these two films, she was billed as "Phyllis Isley" (with two Ls in her first name), but she failed a screen test for Paramount Pictures and decided to return to New York City.
Split into simpler sentences: In these two films, she was billed as'Phyllis Isley' (Phyllis now spelled with two Ls). However, she failed a screen test for Paramount Pictures and decided to return to New York City.