On an afternoon in which disgruntled Oldham Athletic fans staged a protest against owner Abdallah Lemsagam, Latics had a frustrating 90 minutes as they were held at home by lowly Leyton Orient.
Ryan Brooke ended his three-and-a-half month goal drought to help earn Mossley a deserved draw at home to second-placed Trafford.
Mossley’s lack of firepower was evident in the home defeat by Colne in BetVictor Northern Premier League’s north west division.
In a winner takes all final group game, Oldham Athletic were comprehensively beaten at Fleetwood Town who progressed to the knockout phase of the Leasing.com Trophy.
Stalybridge Celtic were more comfortable winners than the scoreline suggested as they triumphed at Ashton United in the first round of the Integro League Cup.