Any question answered...

You want to come out of both or neither; the worst case is being clipped in on one side only, so the bike has leverage on your ankle.

Thanks, I've never crashed on track but on the road in most cases I ended up coming out of both but the couple of times I didn't were more painful, and even more awkward to get up from!

I'd go for 'assume' in that case.

Cheers