John,
I am not positive if this is what you are experiencing or not, but one possibility is when more than one "Attachments" Document Folder is selected under the "Send with Communication?" Column on the "Attachments" Folder Tab for your Communication Template.
If you look at the screenshot below, you will see that all three Check Boxes for the "Attachments" Document Folder for the Main and Cloned Work Order Tracking Applications are Selected.

All three of these Applications point to the same Owner Table when the row is added to the COMMLOG Object, the WORKORDER Object. The Owner ID/Owner Table (1,631,335/WORKORDER) is only needed once. There should only be one of these "Attachments" Document Folder options checked in this situation, not all three.
Check and see if there is a Communication Template that might be associated with the process of "Completing a PM Work Order". Maybe certain individuals had requested an email for when a PM Work Order is completed? If you can locate the Template, check and see if there are multiple Check Boxes Selected for the same Application Family, and the same Folder Type, relating to Work Order Tracking.
I hope this helps.
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Steve Platt
Maximo Administrator
Georgia Building Authority
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