Lance – re the race control software – yes it randomizes as a suggestion, but Steve can over-ride it (we do that to have a specific person race first so they can leave early if they have a family obligation et al.) So – if its allowed – and you do enter two cars – you can be setup to race different cars in different heats. But more manipulation may be needed, depending on how many people are entered.
Least complicated solution – race different cars on different days.
"... get on your bad motor scooter and ride!"
Sammy with Montrose