Manor Farm, who came up from the Toostation Western League, won 3-1 at home to neighbours Mangotsfield United.
Former Mangos striker Ben Bament gave the home side an early 5th minute lead that Jordan Metters doubled 12 minutes later.
Steve Davies reduced the arrears with 14 minutes to go, but Dean Stamp killed off any hope of a Mangotsfield comeback with Manor Farm`s third 2 minutes into stoppage time.
Taunton edged out AFC Totton 2-1 at Wordsworth Drive.
A crowd of 372 saw Matt Wright put the Peacocks in front after 14 minutes.
Craig Feeney pulled the visiting Stags back on level terms on the hour-mark, but Ben Adlesbury won it for the hosts 10 minutes later from the penalty spot.
Slow starting North Leigh recorded their second win, 2-0 at Slimbridge.
It looked to be heading for a 0-0 draw until George Seacole grabbed an 84th minute lead for the visitors, and then a Michael Hopkins spot-kick 2 minutes into time added on ensured the points went to Oxfordshire.
Barnstaple Town looked to be heading for a second win as they led win-less Yate Town 3-2 with only 9 minutes to go before Charlie Hutchings rescued a point for the Bluebells.
Earlier, Barum led through a 13th minute Billy Hopcroft effort only to trail to goals from Bradley Abrahams after 23 minutes and Ben Brooks just before the break.
But a Jordan Charran brace in the 51st and 59th minutes ensured the spoils were shared.
Shortwood United looked to be heading for defeat as they trailed Didcot Town to a 57th minute Adam Learoyd effort with less than a minute remaining when Joe White grabbed an equaliser.
BY STEVE WHITNEY
Keep up-to-date with our exclusive email newsletters.
Subscribe