I was in operations working the DuPont schedule for over a decade. Concerning DST, you work an extra hour, with pay, or work a shift that is one hour less, depending on which direction the clock is moving
When we worked the 11 hour shift (normally 12), as clocks spring forward, you would be compensated a full paycheck if you had no overtime hours, as the company was forced to pay you a full 2 weeks of wage for the pay period. If you had any overtime hours in that check, your pay would reflect 1 hour less to cover the shortage due to the time change.
Some companies pay the full 12 hr shift when the clocks spring forward, but mine didn’t.