If this is a purchase, tell the sender to resolve it or send it again as you havnt received the goods you paid for.
You can also "chargeback" if you paid by card for the same reason,
Many cards so not require anything under a certain value like £30 and are used as "touch n go" etc.That could be why the small went through and the large didnt and is pending.
Mostly for show, but in reality to use the car whilst the transfer of ownership etc is processed and new plates issued.
Technically cant go out of province or after dark but never heard of that like many things ever enforced.