Board Thread:Show-Related Questions and Answers/@comment-31636265-20170331035110/@comment-25822369-20170331040025

The most obvious answer would be--it was only the second episode. Things aren't set in stone straight away, which is why most shows have their continuity errors in the first season. The show probably didn't have things figured out yet. As they go along, they add stuff or change the ways of another.