Long time lurker of this thread, first time poster because I thought the same thing. But I remember they sent an email a little while ago saying this:
"We're pressing three vinyl variants:
-Black/White Color in Color with Bside Silkscreen Print
-Black/White Aside/Bside with Bside Silkscreen Print
-White with Bside Silkscreen Print
For your subscription, you will be receiving the Black/White Color in Color with Bside Silkscreen print"
So maybe their website is listing it wrong?