Holt United moved top of the table with a single-goal success against Cranborne.
United left it late and needed a 92nd-minute winner from substitute Kevin Collins to pinch all three points.
A sixth defeat of the season leaves the Cranes rooted to the bottom of the division.
They replace Merley Cobham Sports, who notched a surprise win at the side that started the day at the top of the pile, Portland United.
Sports ran out 3-2 victors but only after blowing a 2-0 lead given to them by Aaron Atkinson within 15 minutes.
Tom Bell and Mitch Conning drew Portland United level with goals in the 40th and 42nd minute but Atkinson completed his hat-trick on the stroke of half time and that goal proved enough to secure victory.
Wincanton Town remain unbeaten following a 6-0 success away at Blandford United.
Reynold Turnock hit a treble, David O'Hare scored twice and Michael Rousell also netted in what was a walk in the park for Town, who remain third.
Blandford drop down to twelfth in the division following their sixth defeat of the campaign.
Hamworthy Recreation still occupy fourth after a comfortable 3-0 win over Shaftesbury.
Mark Dykes gave his side a third-minute lead and they didn't look back, Wayne Hole and Steve Trembath adding second-half goals to see off eighth-placed Shaftesbury.
Chickerell United registered a third win of the term by putting three past Wareham Rangers.
Liam Beades, Steven Welch and Joshua Why were all on target for the Chickens, who move up to seventh.
Swanage Town & Herston climbed out of the bottom three with a 1-0 win over Sherborne Town.
Liam Currell kept his cool from the penalty spot to give the home side just their second win of 2012/13.
Poole Borough slip into the bottom two after a 3-0 reverse at the hands of Tintinhull.
A Jonathan Delahaye strike was sandwiched between two from Adam Clememts got Tintinhull back to winning ways.
In the League secretary's game of the day Parley Sports ran out 3-2 victors over Bridport Reserves.
Dan Hiscock's stunning effort five minutes from time sealed victory for Sports, who are up to fifth.
