Yes it's an embarrassment to BART management that the Family Leave clause was mistakenly left in the agreement document.
However the Union is being dishonest when it states that this provision was one of the intended benefits all along. The ATU provided the detail (not just a summary) of the various provisions to its members when it recommended that they ratify the deal. Every other provision was explained, but nowhere was the Family Leave clause mentioned.
BART management clearly needs a revamping of its document processing, but the core of Union management is deceitful.