possible evil box glitch?

Honestly, after opening around 50+ boxes in a day i was still getting Chaos Scrolls, Acc ATT scrolls, Special Pot Scrolls and AEE, all rather late on, the first couple i had that day were Accessory Dex scrolls and a 2-handed weapon ATT scroll. Towards the end i was getting a lot of potions, but i feel thats mostly because i was getting so many boxes and was bound to get some eventually, not some weird coding thing.

So i dont really see what you guys are seeing.

Though i suppose it is possible considering that the boxes are already coded to some degree to give us items which are useful to us (Apply the same thing to Gachapon Nexon.)