Dear Lori,
Thank you for your feedback.
We apologize that the website on Viator has misrepresented the experience. We have since had them correct our description.
Indeed, the Louvre does not sell skip the line tickets, but reserved timed tickets.
While not technically skip the line, the reserved entry tickets do make the wait rather brief. As always, even at sites which offer skip the line, there can be a slight wait while proceeding through mandatory security checks. Unfortunately, this cannot be avoided.
We are pleased to know that otherwise you had enjoyed your experience at the Louvre with your tour guide.
Thank you for your understanding, and for your valued feedback.