Richard Gauntlett took excellent figures of 6-43 for Oxford Downs 2nd to help set up a five-wicket success at Kimble.
The home side's decision to bat first backfired as only Tony Skeggs (46) made much progress and they were dismissed for 131.
Paddy Daniel (39no) then held together Downs' reply.
Kimble 7, Oxford Downs 2nd 25.
Challow & Childrey 2nd threw away an almost certain victory by allowing Buckingham Town to recover from 111-8 to 179-8 for a two-wicket win.
Challow's 178 all out was built around Laurence Jones's 57.
Rudi du Plessis (4-64) then had Town in deep trouble before Matthew Thatcher (60no) and Ryan Spragg (38no) took their side to an unlikely victory.
Challow & Childrey 2nd 11, Buckingham 2nd 25 Stokenchurch were convinced that losing the toss cost them the game after they were rolled over for 82 at home to Banbury Twenty 2nd.
Mike Wedderburn took 4-14 for Twenty, who were 17-3 in reply when Asif Hussain was dropped on nought. Hussain made the most of his good fortune by hitting an unbeaten 52 as the visitors reached 86-4.
Stokenchurch 4, Banbury Twenty 2nd 25.
Shipton-under-Wychwood 2nd had no answer to Twyford seamer Jason Heslington, who bowled with pace and accuracy to take 6-19 and dismiss the visitors for just 65.
Earlier, Twyford had scored 174 all out, thanks in the main to a determined 71 by Ian Perna.
Twyford 25 Shipton 2nd 5 Andy Hitchcock took 4-51 and Steve Greaves 3-29 as Princes Risborough restricted Chearsley to 132-9.
Adam Morton's 39 helped Risborough to 134-5.
Princes Risborough 25, Chearsley 6.
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