Double click

I'd love to start understanding Keynote but it seems I am thoroughly confused by it. All I'm trying to do is build upon a slide. The project I am trying to build is like the face of a clock. I start with the circle, and sequentially add the 1,2,3... for each new slide. Simple. But when I hit the play button I have to double-click each slide. I duplicated each slide so I wouldn't have to recreate the slide 12 times but when doing so, Keynote seems to add an extra hidden step that I cannot find anywhere. When I go to the top dropdown menu under Play > Rehearse Slideshow, I can see the extra slide labeled as "Builds Remaining" which I do not understand at all. I just want it to advance to the next slide, not this hidden slide(build) that makes me have to click a second time. What I would think should be easy is proving to be a PITA. Anyone know where I'm going wrong?