Stalybridge Celtic snatched a late winner to all but confirm their status as a step seven club for another season.
It was a great night at Bower Fold as Simon Haworth's side, who entered the game on the back of a 1-0 victory at Atherton Collieries four days earlier, took the lead through Jake Burton in the 24th minute.
The visitors, who were looking to forge their way into the playoffs, pulled level in the 79th minute thanks to the league's leading scorer, Jacob Hazel.
However, the Seasiders' playoff hopes were dealt a a huge blow as Connor Falls headed home from close rage in the 94th minute to give the hosts the three points.
Celtic return to action this weekend and welcome 19th place Radcliffe to Bower Fold.
There has been a fair amount of discussion among the Oldham Athletic fanbase about the club’s financial situation in light of the fact that Micky Mellon’s transfer activity is strictly controlled this January – he needs to get players out through sales and loans before he can get anyone in.
Curzon Ashton’s miserable record against Kidderminster Harriers continued on Saturday, as a single goal was enough to see the hosts get the better of the Nash at Aggborough.