What you've got here is a 'ghost segment'. I've found quite a few in the Cape Town area as well. Funny enough, this ghost segment was actually last edited my me
but I can truthfully say it's not my fault!
What you need to do is (and forgive me if I over-simplify this - I don't know your level of knowledge):
Select the segment in question - make sure it's the right one.
Click Permalink - just below the bottom right corner of the map display.
Copy the link from your browser's address bar.
Click on Support at the top of the screen.
On the page that appears, under Quick Help, type Ghost Segment Removal.
Click on the e-mail button. ("Ask an Agent by: )
Can't remember exact details here, but send them the link you copied.
You will need to give your details, and you will receive an e-mail when it has been deleted.
Good luck with it, and I hope it's fixed by December, as I will be driving there for the Alfred Dunhill Championship...