[Kevan]

Whilst that's true, the cars were run in pairs with each pair having very similar qually times so in theory the races should have been close...this was true sometimes and not others as car setup doesn't suit everyone the same. 

The only times I've seen proxies run one car at a time is Rally, qually, and hosts running their round solo. 

As Graham stated hosts could run their round how they preferred you could run them singly if you prefer.