The dealer can not submit orders without having available slots. What they will do however is take a deposit in hopes of one opening up and give it to the next in line.Personally I don't think submitted means jack until they are able to apply a build slot to it.
Issue is the dealer can have 7 upcoming build slots but submit 14 orders. Then what? My understanding is Lamborghini tells dealer X "you will receive Y STO allocations" and "Y allocations" will show in their ordering system, and the dealer can then submit orders against them but then each month they get their actual allocated build slots, and need to apply those orders to a build slot. Until that happens, I don't think you are safe.
I believe the dealer can keep submitting orders into the system beyond their allocation number and just cross their fingers they get more...that is why I don't think order submitted means you are in the clear.
I could be wrong... Lambo2018 you are certainly the stronger expert on this.