Matt, it is good that you solved the problem, would be good to know the how and why though. Your picture didn't show anything that should have caused such an error but it may have been other elements on that same page or even another page that was causing the duplicate error and message.
Just one suggestion for the future. From the posted jpgs I have to assume that you are using either DXP or AD software. Not really Protel (it's now Altium) and you should always post which version you are using so that people can best understand the possible sources and solutions. There are major differences between Protel P98, P99SE or even earlier versions and Altium DXP/AD software.
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Sincerely,
Brad Velander.
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