On OS X 10.9.4, using Pages v5.2.2, Preview 7.0, and Notes 2.0. English language and keyboard.
Export 5 pages of Lorem Ipsum text in Baskerville to PDF from Pages. Open the PDF in Preview, and launch Notes. Copy and paste 3 paragraphs of content from Preview to Notes. Formatting is retained. No exclamation points found. Notes paste undo. Paste and Match Style from Preview to Notes. Formatting lost, and no exclamation marks.
I repeated the above with 3 paragraphs of content that contained an image, strike-through, and hyperlink styling. The image and styling were stripped from the paste, which retained paragraph format. Paste undo. Paste and match style lost format, but in either case, could not reproduce your exclamation marks.
It is a bad idea to send a Web developer content in MS Word documents. The wrong copy/paste behavior between MS Word, the browser, and the web content editor (e.g. Drupal 7 editor) can embed Microsoft document styling code into the web content, where it decidedly does not belong. This adversely impacts web page layout, behavior, testing, and developer productivity. From personal experience, I expended much time cleaning up MS Word web artifacts during a large site migration in 2013.