Board Thread:Game Discussion/@comment-71.224.147.45-20161009160818/@comment-27510501-20161011185034

Yes, that's exactly how it works. Once you have driven a car in-game, it shows up in your garage view to other players. The side tab shows you what other players see about you - that is, they now will see you as having 163 cars, even though you really have 162 at the moment.