Why does my Writer document have Internet links when converted to Kindle format, and how do I turn them off?

I sent a book manuscript to Amazon to have it converted to Kindle format so that I could review it before publication. When I downloaded the Kindle conversion Internet links appeared. Now I may have cut and pasted some words or phrases from the Internet. Did the links come with them? More importantly, can I just make one change using the tools on Writer or do I have to review the entire document and re-type every word or phrase which now appears in blue and underlined?