The following notice was posted and found on ePayroll at USPS Liteblue on 10/16/2018:
"An issue has been identified with the processing of the PP 21-2018 Payroll that prevented some employees from not being paid correctly. The largest percentage impacted were APWU employees but other bargaining and non-bargaining employees were also impacted. Impacted employees may not have been paid fully for overtime, penalty overtime & night work, and may have had their leave hours paid reduced. Employees should review their earnings statement to ensure they were paid correctly for PP 21-2018. A recovery is being planned to correct impacted employees' pay."
The APWU site has posted a the following article relating to the issue:
Significant Payroll Issue Identified
"... the APWU became aware that the Postal Service identified a computer glitch with the payroll system that will affect nearly 90,000 APWU represented bargaining unit employees. The APWU immediately contacted the USPS about the issue and will continue to monitor the situation..."
Reference: www.apwu.org