"I have already run these payrolls. Why is this happening"
It also happens if you use "Unscheduled Payroll." The Function is Payroll Schedules, as a helper tool. For instance, someone set up that Salary People are paid Monthly and Hourly People are paid weekly, and the program now tries to help you stay on track. Then, someone is Bypassing the use of the function, so the program isn't Incrementing the dates (pay period and pay date) for you per how you told it to help you manage schedules.
"...it happens also in the liabilities screen."
That's a Different Warning. This warning is telling you about Scheduled liabilities. This one is telling you that someone told it what taxes and other withholdings and payments related to Paychecks, need to be paid By a specific date and on a specific Cycle, such as FICA might be due mid-month for the prior month's paychecks. It means you need to be using Pay Liabilities, to show you Paid what was owed for the Period owed and by the Due Date for each Liability (payroll item) that is Scheduled. It means you should not be using Bills or Write Check, for these activities that are part of Payroll.
