Top scorers on the day were third placed Boston United Reserves, who bounced back from defeat at Skegness to hit four past Cleethorpes Town’s second string.
Leaders Hykeham also returned to winning ways with victory by the odd goal in three against Heckington United, who are now bottom of the table.
They replaced Nettleham on the bottom rung after the Mulsanne Park side edged past Horncastle Town.
Skegness Town completed a league double of 1-0 wins over Lincoln United Reserves, while Skegness United went down by the same score at Ruston Sports.
Gainsborough Town consolidated their fourth place in the table with a narrow win over CGB Humbertherm.
Results - Boston United Reserves 4 Cleethorpes Town Reserves 1; Gainsborough Town 2 CGB
Humbertherm 1; Hykeham Town 2 Heckington United 1; Nettleham 2 Horncastle Town 0; Ruston
Sports 1 Skegness United 0; Skegness Town 1 Lincoln United Reserves 0.