If the lap counter accidentally missed a lap for a race you will need to split a lap into 2 laps so that the racer gets proper credit. To split a lap for a racer after the race has been ran you must select the race in the table on the upper left side of the Statistics Screen and then select the racer in the summary table on the upper right side of the screen. This will populate individual lap information in the lower left table of the screen.
Select a lap in the lower left hand table and clicking the Slip Lap button will cause a pop up asking you if you are sure you want to split the lap. Click yes to split the lap. If yes is clicked the lap is split and the summary information for the race is recalculated. This is needed just in case the ranking or other statistics of the race change as a result of the lap split.