Custom Report causing Duplication

I have customized the stock WIP Recon to include the product group description.
I linked the Recon and the JobHead table using an ouput definition on company and Recon.TmpJobNum to JobHead.JobNum.
I’m using the linked tables to pull the description from the prodcode.
It has been working fine for months, but now I’m getting a duplication on a job, but only when I run it for after 8/24.
I can’t figure out what might be causing the duplication on this one job. (This goes away if I run standard).
The transactions that happened on 8/24 were some material issuance.
Any ideas where to look?

You can see the duplication here: