Hi there and welcome to our community
I think I'd begin by scrutinizing the Master Page. My guess is that you have two different areas defined for the header info.
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Thank you so much for responding to my issue. We do have two Headers defined because the header for the Welcome page is different than the topic pages. The header for the Welcome page only appears once, the header for the topic pages appears twice. So, I can probably compare the html on those pages to see what's different. Other issues have taken priority right now - I havent' been able to publish to our webserver - but that's another discussion.