Kirton Town edged out Old Doningtonians in a five-goal thriller in the all-Boston League tie.
The Dons, trailing 2-0 at the break, got back into it through Danny Goodacre’s penalty before Town added another.
Chris Wing pulled another goal back when he chested the ball down before firing home from 12 yards to make it 3-2 but Kirton held out for a narrow victory.
Pointon’s efforts came to an end in extra-time as they finally ran out of steam at home to Louth Town.
They went 5-1 down but clawed their way back and replied with a four-goal blitz to bring the scores level.
Pointon tired in extra-time and Louth scored four more times to run out 9-5 winners.
Pointon’s goals came from Sam Husband (3), Casey Kemp and Harry Tomlinson.
Swineshead Institute enjoyed a comfortable passage when they outplayed Louth Old Boys at home.
Bert Snaith did most of the damage, hitting four goals in a 5-0 victory while Alex Snaith grabbed the other.
Peterborough League top-flight team Crowland Town won 6-1 at Susie Star.
Ben Partridge and Kurt Scott struck but Division One side Sutton Bridge United lost 4-2 at Tetney Rovers.
Third round (November 12, 1.30pm): Wyberton v Shape Changers, Stamford Lions v Appleby Frodingham, Nettleham v Ruston Sports, Tetney Rovers v Scotter United, Leverton v Kirton Town, Epworth Town Colts v Sleaford Sports Amateurs, Pinchbeck United v Long Sutton Athletic, Hykeham Town v Fishtoft, North Somercotes United v Moulton Harrox, Market Rasen Town v Spilsby Town, Horncastle Town v Crowland Town, Baston or Langtoft United v Ruston Sports, Benington v Swineshead Institute, Coningsby v Epworth Town, Brumby v Skegness Town, Barnetby United v Louth Town.
LINCOLNSHIRE FA SUNDAY CUP
Third round (October 3): Greenbank v Helpringham Rovers, Crosby United v Ivy Tavern, Bassingham Bugle Horn v Waddington United, Metheringham v FVA Jerusalem, Nobody Inn Athletic v FC Genes, S Grantham Electrical v Cromwell, Holbeach United v Bradley Rovers, East Marsh Mariners v Gatehouse, Railway Inn United v Crows Nest, P+P Plumbing & Heating v Payzone, AFC Plough v The Notts, Smiffys United v Parkway, Scothern United v AFC Brigg, Rustons United v Crowle United, Welton Sports v Chancel, Ruston Sports v Punchbowl Tigers.