Links are inconsistently formatted on a page (blue and underlined and/or purple and underlined)
This only happens when you copy and paste from a webpage that you have opened in Internet Explorer. Therefore, use Firefox to edit pages in the CMS (and to view the page(s) that you are copying from).
If you have access to the source code, you can rectify the formatting by removing <u><font color="#0000ff"> wherever it appears. (The closing tags, </font></u> get deleted automatically by the CMS.)