You have been using Pages ’09 on Lion. Even if that was the most recent update (v4.3), it probably only has rudimentary understanding of Word 2010 .docx document architecture, and certainly not Word 2013 changes. If your friend is using Word 2013, have them export the document in a slightly older Word .doc format. See if that file format can provide you with a print review in OS X. So yes, there may very well be Apple/Microsoft compatibility issues.
With the latest Pages ’09 v4.3 update, you can continue to use this version of Pages on Yosemite, as it provides 100+ features/functionality more than the latest Pages v5.5.1 for Yosemite. Although the later has had some attention to Word 2013 content, the loss of basic word processing features, and no backwards compatibility with Pages ’09 — make it useless. LibreOffice has kept pace with changes in Word 2013 content, and in fact, it is one of their save formats.
Just remember that no version of Pages is a Word clone. All input, and export of Word documents is an approximate translation into Pages native .pages document architecture. This translation is only as accurate as Apple has programmed changes in Word 2010/2013 document specifications.