The grey out is to show you that this subtask (OML-30) is part of the story (OML-15). You should find another non-grey item on your board which is the current position of the story (OML-15). If the story and subtask are in the same column then the OML-15 will not be grey.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.