The variant testing is apparently not working.
My understanding is that to test view a variant, you enter the URL as such:
mywebsitename.com/a.html
mywebsitename.com/b.html
etc.
I have a second variant active and have assigned it 50% traffic. It IS published. Yet when I go to mywebsitename.com/b.html I get an error “The requested URL was not found on this server.”