i had a custom runier and i went to the mod shop to upgrade it. when i got back it said my garage was full and asked me to replace a car. since i was driving the runier with upgrades i figured i'd just replace the runier... nope. when i got into the garage, my modified insured runier was replaced with a stock, uninsured one. ugh.
i had 2 ballers in there waiting to go to LS for sale, i knew i should have replaced one of those, but i figured the game was smart enough to realize i was driving a modified turbo runier and that it was already my custom car, just upgraded, so it would replace the one i already had with what i was driving.