The score will depend on your location, but I agree, it looks like the page has has 2 blocking CSS resources.

they could use their own advice and fix it: "Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML."

The score seems to depends on the browser you test with.

Using Firefox 44, I get 52/100 on mobile and 92/100 on desktop.

Using IE 11, I get 59/100 on mobile, and 99/100 on desktop.

Title should be updated to note that is only on "Mobile". They score a 99/100 on Desktop.

It says 99/100 on mobile and 95/100 on desktop for me

which browser?

Chrome beta on mobile get 59/100

*on mobile