Have you tried to set up a view object of your own and add the two lov to the attribute by flowing the steps given in the mentored blog?
Yes I did
In fact I know well how to make switch model driven LOV.
In the very beginning I tried to do this task in my work and I find out this problem. So I downloaded the Demo to test it and I discovered that the demo too does not work.
In this case you should file an SR with support.oracle.com and let them work on it.
It doesn't make sense for us to see the same you already know.