Clear WIP quantities on old jobs

We are on 408.403 and I found a bunch of old jobs that have been closed with quantities still in WIP. The "WIP cleared" field is flagged and they do not show on the WIP report or Inventory Wip report as unposted transactions. However when I look at part locations I see quantities in there and looking at the PartWIP table there are quantities in there.

Has anyone come accross this and how have you fixed?