Ben Gladwin scored two penalties as Swindon were held to a 3-3 draw at home by mid-table Walsall, all-but ending their slender hopes of automatic promotion.The faltering Robins fought back from 2-0 down to level at 2-2 only to fall behind again before Southampton loanee Jordan Turnbull salvaged a point nine minutes from time.A mistake from Swindon goalkeeper Wes Foderingham, allowing Kieron Morris' tame shot to slip through his gloves in the 18th minute, setting the tone for a topsy-turvy evening.Jordy Hiwula doubled the visitors' lead seven minutes into the second half, dispossessing former Wales defender Sam Ricketts before finishing neatly.Gladwin reduced the deficit from the spot seven minutes later after Jermaine Hylton was tripped by Richard O'Donnell, although the ball seemed to be out of play when the tackle was made.Midfielder Gladwin completed a quickfire penalty double in the 67th minute following Adam Chambers' foul on Nathan ByrneRomaine Sawyers looked to have won it by converting a Ben Purkiss cross 16 minutes from time only for Turnbull to head another equaliser.