Void used instead of Reversal after FI Posted

We have a scenario where a employee was issued a check on the 10/08/2010 off-cycle which was later voided. The original posting for $282.51 is in FI but the reversal never came through. Her voided record still appears on the u201CCheck Completeness of Postingu201D as not having been posted and the end user tried to rerun the FI simulation for her in various ways but the system will not process it.

We believe this happened because it was processed as a "void" mistakenly and should have been processed as a reversal. A "void" is usually processed when FI posting has not yet taken place. It appears that a void will not reverse posting results. How do we correct this in the system?