Good Grief.
Apparently, you think JLR should monitor all their vehicles and some how know when they are sold off?
Of course not. But you do have to think of the process... and bump it up against a few things.
It's the typical security see-saw balance of usability versus security.
Make it too easy, then a auto thief can easily make changes so you can't track the car.
Make it too hard, then the owner gets upset.
Like any new technology where security is involved, it takes a bit for a good balance to be struck. So in the mean time, don't get too pissy about the situation. Instead, work to find a balanced solution. This is what security professionals are supposed to do.