You are Wrong He has chosen His successor. The Successor was His Cousin Grandfather who was residing at bakala at that time. Punjabi word Baba Means Like Grandfather. The Sakhis have some other point to stress upon. In The sakhi which you are quoting has the point that whenever you are in distress remember the almighty and pray to him for strength and inner peace.First 7 Gurus all picked their successors.
8th Guru couldn't, So how was 9th guru picked according to Gurbani