hi,
1. There is no payroll result reversed, payroll posting reversed is there if any changes in the payroll and the same has to post. if the same month payroll live run done and posted to FI (PCP0) then we need to reverse the posting and then run correction run and then post to FI.
2. Payroll results may be voided or leave it like that, when no use of posting to FI (Normally this will not happen in the Projects)
3. Payroll results deleted, deletion will happen for the periods which are not posted to FI only. normally we run correction run if necessary then will go for payroll result deletion.
Best Regards.