Though style sheets can seem confusing at first, they are among the most important tools at a copyeditor’s disposal. As long as you keep your style sheet organized and record all of your decisions related to mechanics and style, you should be all right. (Or is it “alright”? Better check the style sheet.)
English is hard. According to the Oxford Royale Academy, it’s one of the top five most difficult languages in the world today. So why do we, as writers and especially as editors, accept making our jobs that much more difficult by using so many different style guides?