Hm… I was under the impression it was rare nowadays to have such a difference between the two, clearly I was wrong. And yes, with such layout problems between the two suites, you can’t use LibreOffice if you’re working conjointly with peoples using Ms Office. (Which is, lest be honest, the case almost all the time.)
That said, for peoples at home who don’t need to share a modifiable version of the documents they create, y would still recommend LO over MsO, for no other reason than the price. (Which DON’T include peoples bringing work at home, nor those working on some collaborative documents in their free time.)
Wich is what I said should be donne in such a case in my last answer, just with my own words.
And no, using old MsO versions in not a sin, especially if you can't do otherwise. (Not thut it would be a sin to use what you're more comfortable with anyway.)