I probably have the earlist version of this set because I bought it very soon after it was released. Maybe they made some changes over the years. If you look at the listings on their website, then read listings on the back of your boxed sets, then read the actual DVD sleeves, you will find other discrepancies . . . not many . . . but you'll find some. I don't think they spend much money on Quality Control . . . but that's okay as long as they keep selling these 50 movie packs for about $16.00.
It's even better when you catch Amazon on a generous day and they are selling the 100 packs for 17 bucks or the 50 packs for 11.99. I bought four of the things when the price dropped once. And I'd buy more if I catch them doing it again.
But the discrepancies drove me nuts. Especially the "Devil Times Five" thing. I bought a 20 pack called "Devils and Demons" to get that and that set is out of print now. Sadly, I have every single one of the other movies in at least one, sometimes two to three other sets.