To check if they are still there, disable TBag.
TBag's information:
TBag can only "see" something you've seen, so for every character:
1) Open your bags 2) Go to the bank 3) Check your mail 4) View your body 5) Open all your trade windows
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Make sure the addon can detect the item, try buying another, or finding one. Also the addon is a bit outdated (4.2) so that might be a thing.