If you process more than one pay cheque for the same employee for the same Payment date the Year to Date doesn't change on the pay slips! eg. Employee were paid two weeks wages on the same day on the 9/1/13 to. I processed the wages for January and thought I'd check the four pay slips. This is when I discovered the error. The Pay slips from the 9th to the 31/1/13 were all out. I had to delete the pay slips and re-enter - Painful!!!!