i do not know information like Antoine provided but what i do know is GOOGLE & SCN --- just searched for the exact "cluster CU and payroll cluster are not consistent"
please have a look at the below post i think you might have gone through them already (looks like some one has deleted the payroll results? not sure 
)
Cluster CU and payroll cluster are not consistent - Toolbox for IT Groups
Repairing of Payroll Result - Toolbox for IT Groups
Inconsistencies in Payroll - ERP Human Capital Management - SCN Wiki