The only things I can think of that would cause this are:
- You've updated the layout (making it larger)
- Your screen resolution has decreased
The auto-resizing feature should only decrease visible items if the layout is too large for your screen dimensions, and only to the point that it all fits and no more. But it certainly isn't the end-all-be-all - it isn't intelligent about what should be decreased in size, etc. You're the best judge of that. So I would recommend picking one or more items on the screen that could be sized smaller and still look OK. The clock might be the easiest thing since it is typically the largest (and you'd only have to resize 1 thing).
Whatever you resize, make sure you resize for each of the Odd Rounds, Even Rounds, and Breaks, or you might find that you've made everything fit for round 1, but for round 2 it jumps back to the previously too-large size.