I would like to have a go at baking two cakes at the same time in my standard sized oven. What do I need to know? Should I put one on each rack, so they are both in the middle of the oven? Or should I put them both on the same shelf? I would turn them at some stage, right? Or if they are top/bottom, would I swap them?

I'm curious about this too. I actually put three in at the same time 2 days ago. A 12, 9, and 7 they were done a lot sooner than usual. The other strange thing is that my 12 inch did not have straight edges. Sorry i'm not much help but I want to see what everyone has to say

I only bake on one of my oven racks, placed about in the middle... I always bake as many as i can fit on there without them touching maybe 1 inch between them.
I think that it really depends on your oven. My top rack cooks wrong... so thats what i do. youll probably just have to test it

I can do two 8 inch cakes at the same time (and my oven is a little smaller than a standard oven) but I have to turn them about 20 minutes into baking... HTH

In my convection, I just cram as many pans as I can get in there. In my conventional, I use only one rack, but still jam as many pans as possible on that one shelf.