Question about lockdown mode

Does anyone know why in lockdown mode, once I already have the car in the garage, when I take another one like it out of the loockup, it doesn't appear in the garage and it's not converted to money. It just disappears as if I didn't extract it. I only have the car that I took the first time out from the lookup without converting the car into money and I don't get anything from this lockdown session. And another question: why don't the Ferrari FXX or the Regera appear in the garage when I extract them from the loockup? I would appreciate answers if anyone knows anything.