I got an e-mail from LLU saying that I would be hearing from them soon and that they look forward to meeting me. Did you get an e-mail like that before you were invited for an interview? And did you get the invite through e-mail or snail mail?
I received that email and then got an invite a few days later via snail mail. A few days after that, my AADSAS status was updated to "Invited for interview".