Complex sentence: On July 14, the petition organizer announced that the proposal received enough signatures to be placed on the ballot in two years, however, it was determined that only about two thirds were valid and the petition fell short of qualifying for the November 2016 ballot.
Split into simpler sentences: On July 14, the petition organizer announced that the proposal received enough signatures to be placed on the ballot in two years. However, while more than enough signatures were turned in, it was determined that only about two thirds were actually valid, making the petition fall too far short to warrant a full count of the signatures, and disqualifying it for the November 2016 ballot.