Actually, they were wrong, and so are you.
I've posted before, and there are more Supplements than just the Central with similar language.
But here is the Central. Saturday was all time and a half.
Article 8
Section 8
In a scheduled workweek in which there is a paid holiday, the guaranteed workweek shall be thirty-two (32) hours; in any scheduled workweek in which there are two (2) paid holidays, the guaranteed workweek shall be twenty-four (24) hours, etc. For hours worked in excess of thirty-two (32) or twenty-four (24) hours in a week, as applicable, an employee shall be paid at the rate of one and one-half (1 1/2) time the regular straight-time rate, provided the holiday or holidays fall within the scheduled workweek.
