My department at my job is allowing some to have overtime and not others

So I work at a news station, and our news director (basically our manager) decided that the newscast directors are no longer getting overtime, so whenever w have to fill in instead of getting like 5-8 hours of OT my manager docks our hours throughout the week so it comes out to 6 days a week with no OT. Is this legal or just shitty? The real kicker is our photographers are allowed to get as much OT as they want. Do I have any options? Edit: this is in south Florida