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Hi Tony, when I can get into LR, where would I find the metadata presets and will it be obvious how to correct that?
Very first order of business in the Metadata sub-panel is Presets.
Click on the little arrows - all the metadata presets in your system come up. At the bottom of that list is an "Edit Presets..." option.
Clicking on that opens up an "Edit Metadata Presets" box.
At the top of the dialog is the "preset" box - clicking on the arrows at the right end of the box accesses all the current metadata presets in your system.
Once a preset is selected scroll right to the bottom and check out the keyword box. That is where to look for the errant keywords.
However, this is not a random process.
Presets only get applied at your request.
What presets are you using?
Most people apply a copyright preset on importing images or shortly afterwards.
I am assuming that you would know if you are applying any metadata presets.
If Lightroom is not responsible then another possibility is that you are using another application to download images (such as Photomechanic or something similar) and keywords are being applied then to images that are subsequently imported into Lightroom.
Tony Jay