Most likely, the PDF actually contains the text multiple times (either right
on top of itself, or possibly slightly offset to make the text appear bold). 
Take a look at the content stream itself (either using RUPS or dump the
content using PdfContentReaderTool) and see if that isn't the case.

If that is the case, you may be able to contribute an enhancement to
LocationTextExtractionStrategy that detects overlapping words - it may be
really tricky, but it's worth investigation if this is important for you.

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