Meanwhile Wigan fell into the group of six teams separated by just three points, albeit with a game in hand at home to Huddersfield at the end of July.
Brian Noble blasted Wigan's defence afterwards, as Warrington hopped above them in the table with their 38-20 win at home to Hull KR.
James Lowes, stand-in head coach at the Halliwell Jones Stadium, has worked wonders since his arrival, and picked up his second victory from two with the win over Rovers.
Justin Morgan's KR sit on 15 points, and prop up the mini-league of teams fighting for the remaining three play-off places.
They've picked up just two wins in six now, and will need to start winning again if they have realistic hopes of climbing above Wakefield, Bradford and Harlequins.
Wakefield returned to the top six after Sunday's narrow 28-26 win at home to local rivals Huddersfield, jumping above out-of-sorts Bradford into sixth place.
Huddersfield are another side in dire straits. This latest defeat condemned them to their fifth defeat from their last six games. Their search for Jon Sharp's replacement as head coach goes on.
Things got a lot better for Hull FC on Sunday. John Agar picked up his first Super League triumph, as they convincingly saw off Castleford 40-14 at the KC Stadium.
The win takes them four points behinds cross-city rivals KR, and Black & Whites fans have every reason to believe their side will climb up the table in the coming weeks.
Castleford stay rooted at the bottom, three points behind 11th-placed Huddersfield, and look likely to finish there when the regular season ends in September.
The only thing that's predictable about the engage Super League at present is its unpredictability. Leeds seemed nailed-on to pick up two more points at Harlequins, but proved nothing is certain in Super League XIII.
Predicting the results is one thing, but predicting the final shape-up of the play-offs looks impossible at the moment. Hats off to anyone who can call that one.
