i also had this happen when i got the chevrolet impala SS FE (the newer one) a while back it also never showed up in my garage.
i also got the camaro SS twice as a gift today, was that supposed to happen because i got multiple FE cars from the rivals event because i was in the top 20% in that rivals event
would be kinda strange to get the same car twice as a reward for the same event.
but yea all my other gifted cars from today appeared in my garage immediately, so is there a certain time it could take for a car to appear in your garage after you press the message in the gift list?
because i would love to own that TVR 