What is the difference between the dates in "Payroll Association" and "Payroll Assignment Details"

Summary: On the "Payroll Relationships" screen, there is a section called "Payroll Association" and a section called "Payroll Assignment Details." Both sections have the below fields:

• First Standard Earnings Date
• Last Standard Earnings Date
• Last Standard Process Date
• Final Close Date

The dates don't always match. I assumed that these dates only existed once per payroll relationship. What table do they sit on? I found the dates that match the "Payroll Association Section" on the pay_assigned_payrolls_dn table. The fields are FSED, LSED, LSPD, and FINC. Any help on identifying the table that holds the dates for the "Payroll Assignment Deteails" section would be appreciated.