Hallam suffered their first league defeat in 11 games - and their first at home all season - at the hands of Division One promotion rivals AFC Emley.
But in the Premier Division, Handsworth quickly put their defeat against title rivals Cleethorpes Town behind them to put five past Maltby Main.
And it was a good weekend for Parkgate, too, who hit seven past Barton Town OB without reply to climb off the foot of the table and to within four points of safety.
Hallam lost out 2-0 to Emley in a battle between two promotion hopefuls, and they were behind on 15 minutes when Ashley Flynn cut inside to beat Dave Darwent with a powerful low drive for his 25th goal of the season.
Hallam struggled to create any clear cut chances in the second period and with 10 minutes to go, Emley got the all important second to seal the points thanks to Jordan Coduri’s shot.
Parkgate cruised to victory in the proverbial six-pointer against relegation rivals Barton Town OB. Josh Moore gave the Steelmen the perfect start with a goal after just two minutes.
Alex Lill doubled the lead on 18 minutes before adding a third four minutes from the interval. Lill then completed his hat-rick right at the start of the second half to put the game out of sight.
Kieran Hirst’s first of the season extended the lead further before Jassim Alali and Nicky Harper’s first for the club rounded off an impressive display and one that gives Parkgate real hope of avoiding the drop.
All Handsworth can do is keep winning and hope that those above them slip up if they are to keep their title hopes alive. And Mick Godber’s side did their part with a convincing 5-1 home win over neighbours Maltby.
The Ambers couldn’t have wished for a better start as Jon Froaggatt tucked home a Danny Buttle corner after just two minutes.
Aaron Moxam then saw his penalty saved after Simon Harrsion had been brought down in the box. The striker, though, quickly made amends nodding in from another Buttle corner to double the lead with just 11 minutes gone.
Froggatt grabbed his second two minutes before the interval with a superb finish and Micky Harcourt headed home the fourth.
Maltby pulled one back seven minutes from time through Reece Wesley, but Handsworth had the last word as Moxam slotted in the fifth in stoppage time.
Staveley MW stretched their unbeaten away run to six games with a 3-0 victory at Clipstone - who had eight former Staveley players in their starting line-up!
Athersley Recreation returned to winning ways after back-to-back defeats with a last gasp 2-1 victory at Bottesford Town, but Armthorpe Welfare were well beaten 6-1 at leaders Cleethorpes Town.
Retford United slumped to a seventh defeat in eight, losing 5-1 at home against Liversedge, while Penistone Church extended their lead at the top to four points with a 5-3 win at Winterton Rangers.
Worsbrough Bridge Athletic were beaten 1-0 at home by Brigg Town, while Rossington lost out 5-3 at Campion.
n Midweek fixtures, Tuesday: Division One: Dronfield Town v Brigg Town.
Wednesday, Premier Division: Cleethorpes Town v Athersley Recreation.
Division One: AFC Emley v Worsbrough Bridge Athletic, Hallam v Ollerton Town.