Hi janui
Having removed the existing mount, I decided I would play safe and start over again.
This time I remembered to insert my actual password and all went as intended. The output from the grep command duly conformed with your specification in all respects - and there is now only the one, correct, line not two.
However, MPD is not now seeing any of my music collection. In the 'Library' tab of the Rune 'Playback' gui it detects 2 "network attached storages". But clicking on that box doesn't produce any list(s). Previously, when both "Artists" and "genres" boxes were clicked that brought up my music sub-folders appropriately sorted. Now both lists are blank.