My challah tastes great, but I'm frustrated with how it looks. The braids tend to meld into each other -- you can barely see any "bumpiness" on the top. Today, for example, I baked 2 loaves -- one came out OK (in terms of braid-iness), the other was nearly smooth on top. Any ideas what I may (inadvertently) done differently with the 2? Suggestions for improvement? The one thing I'm wondering about is the fact that my oven, which has 5 positions, can only hold 1 loaf per level (I need to get smaller baking sheets). So, I started one loaf pretty near the top and the other in the middle. Halfway through I swapped them. (Please don't ask which one started at which level -- I've got no clue, unfortunately.) Would that make a difference? Thanks so much.