United found themselves with a mountain to climb after conceding twice, controversially, inside 18 minutes, with Andy Gascoigne and Ryan Fallowfield on target for the hosts.
The Pilgrims thought they had cut the deficit on the stroke of half-time but referee Scott Oldham deemed that Scott Garner's effort had not crossed the line and although Jones did score with three minutes to play, United ultimately came up short.
PIC: Ken Fox.