It isn't you, it is me not communicating effectively.
I understand the RTF is not appearing in the original Inventory Item and only appears when you duplicate. And the RTF is appearing on the newly duplicated Inventory item not the original Inventory Item.
But that doesn't mean the RTF or text that is causing the issue isn't in the description field. It is or the RTF would not be appearing on the duplicated Inventory ITem
The RTF appearing actually isn't an AW2000 issue but rather a Windows issue. It can happen when text is copied and pasted into any HTML enabled editor directly from a website or Microsoft Word. There are other things that can cause it but those are the most common.
The only way to get rid of it is to a. if you can see it the delete the RTF formatting and reformat the description field.
b. delete the description field and start over.
The description field text can be pasted into Notepad so you have the information. Then after you have deleted the description field completely and Posted changes, then you can paste the text back in from Notepad and format it again.