While I have never received a DVD from Amazon (.de, .fr, .jp, c.o.uk, or .ca) that had a tag ON the DVD - in 10 years of buying from amazon, I bought this twice, once for a friend and much later, after having seen it, also for myself.
Both Sets contained two single-sided DVD.
This is to encourage other would-be buyers to ignore the 1 Star reviews.
Also a tag ON the DVD could ruin a single-sided DVD just the same, as the reflector side under the paint is needed for properly playing the DVD.
As for the contents, it is a great saga and really worth watching. There is another french film which ties in with it, altough totally different and much newer: Irma Veep (1996). It tells the story of trying to remake Les Vampires.