I think they've decided that Lexana isn't bringing in viewers, so won't promote it as much :/
Darling, stay away from TWoP, K-site or Clana boards that are making you believe that. ET did a segment this weekend about that band that is going to play in this week's episode, and what's shown? Lexana. Heavily. And apparently a very cool scene of our couple where Lana is looking lovingly at Lex, who's standing proudly by her side with pictures being take and all.

I don't believe they think Lexana don't bring viewers, besides, how would they decide that fact already when the show has been aired only twice this season?

Fear not. Yet. ;-)