Pay rate changing

Hi

I processed payroll and discovered that the rate for one of our staff changed. This person has a specific rate for annual leave which is different to base salary (long story) but the Sick Pay and Base should be the same rate. In the screenshot the Sick Pay rate is correct but the Base Hourly rate is wrong. Speaking to the person who normally does payroll he has had it happen to him as well however it has only been since we ticked the "Automatically Adjust Base Hourly" option in the Sick Pay and Annual Leave category. Is there a known issue with the automatic adjustment function?

Thanks

Michael