Why is my credit score going down if I pay everything on time?

All Cap Bank 9 Bank of Advance 24 CNB Bank 15 Community First Bank, National Association 5 Conservation First Bank 1 CUSTOMERS Bank 18 FIRST HAWAIIAN Bank 11 First Kansas Bank 1 First Security Bank 4 FreedomBank 2 Gibsland Bank & Trust 6 Granite Bank 14 Grant County State Bank 6 NORTH SALEM State Bank 12 PRIME MERIDIAN Bank 12 Providence Bank & Trust 8 RELYANCE Bank 11 Riverwind Bank 4 TIAA Trust, National Association 25 Wray State Bank 4