Hi! maybe you have to wait for the roots to grow more or longer, maybe around 2 to 3 inches, before removing it from the mother plant. You may refer to an Article or video here at the forum by Bruce (Brutal Dreamer) on how to do it.
http://www.rv-orchidworks.com/orchid...-bark-mix.html
it will be a great help! That is a nice tutorial video!
jenn