I'm not sure of why it isn't working (Apache isn't my forté), but one thing to point out ... I hope this is just a development phase, and not a long-term thing. Having "newversion/" as part of a public URL is just awful. It looks so amateurish, adds a completely unnecessary layer of complexity to the URL (and an additional point of failure for people typing it in), hurts your SEO and looks completely ridiculous when you next revamp the site.
In other words, the basic format of the URL oil-testimonials.com/essential-oils/7484/ should always point to the correct version of the page!
PS - where you're just demonstrating a URL, please don't allow it to become hyperlinked – either leave off the http://www. at the start, or wrap it in [noparse]...[/noparse] tags.