Bognor suffered their second defeat in a week after going down 2-1 at home to Cambridge City.
The Rocks, who have loaned last season's top scorer Matt Russell to Worthing, went behind to a Dave Sadler goal after just two minutes.
Luke Nightingale equalised with a penalty four minutes before half time to increase his tally to 11 goals in 12 games this season but Jon Stevenson netted the winner midway through the second half.
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