STARZ subscriber, yet one episode of Girlfriend Experience wants $2.99

I subscribe to STARZ.  I started watching Girlfriend Experience.  When I get to the season 3, second episode, it wants me to pay $2.99.  Season 3, Episodes 1,3,4,5,6,7,8,9,10 all FREE with subscription.  ONE episode, season 3 episode 2, they want me to buy for $2.99????????  Damn if I'm paying for an episode when I am already paying for a subscription.  What is up with this?