Single
track play and auto-cue are not the same thing. Generally, single
track mode plays the
track, and then stops, either ready to replay the same
track, or back at the beginning of the disc. Auto-cue plays a
track, then pauses cued up at the top of the next
track. Some players also have an auto-pause mode that goes into pause after the
track, but at the beginning of the same
track (sort of a cross between auto-cue and single mode), so you need to manually
advance it.
--A