Hourly rate not updating

I have had issues for several weeks now with updating employee hourly rates. Card files for employees who have had a pay increase are not saving the updated hourly rate. I have tried the suggested remedy of changing the employee to salary, saving and then going back in to change it back to hourly rate with the new rate. It just reverts to the old rate the next day. 

This is very frustrating when doing payroll for 60+ employees. Any advice appreciated!