@ Abraham and Miguelito :
As a part-time / fill-in guy, I wound up working at 101.1 for a year or so. I wound up doing every shift they had --
live or chaperoning. They were 'Easy 101' back then. I still cannot fathom why they hired jocks to communicate, then bring some of those same jocks in to baby-sit the satellite automation stuff. The music carts at 'Eazy' were numbered the same as those on the log, parallel to the tune files of Transtar (later Unistar). And the station would call me (and other jocks) in to do these nighttime shifts even though we'd been HIRED to go on live.
With the actual, * official * music log in front of me, as I kept the air chair warm in a major market, and with all the identical carts on the wall, I used to have fun occasionally playing the set of three scheduled songs in reverse order. Then, of course, the actual syndicated DJ's voice, from I suppose somewhere in California, would back announce the songs in a confusing manner. I got real good at this chicanery. No dead air. Never heard a peep about it, either from the PD or the listeners.