I don’t know if anyone else has this problem but some of the cars I’ve purchased just show up as blank spaces on my cars list. When I scroll down to the space where the car is the name shows up in the top left but the car doesn’t show up until I click on it to go customize it. It’s not a big deal but it would be great if someone knew how to fix it.
Usually, something like that is just a hiccup of a couple things not quite aligned - like perhaps you haven’t Quit your game correctly or you’ve started play too early instead of waiting for 100% completed notice. Check this post for additional information before attempting anything: http://forums.forza.net/turn10_postsm528894_Losing-saves---What-can-I-do-to-prevent-it.aspx#post_528894
Pay close attention to doing a Hard Reset of the system, along with other checkpoints.