No it has never calculated correctly. There use to be a payroll item set up incorrectly as an 'hourly wage' that was adding 1 unit in the 'available' field every pay period - looking at the 'review pay cheque' window. I had to create a new payroll item 'addition' and edit all previous pays to correct. The LSL field has never calculated anything in the 'available' or 'accrued' fields since I implemented the feature. Employee is a casual and employed since 2009, which is the date that was entered in the leave details screen down the bottom near the 'begin accruing time on'.