Just a note for future reference, but you can delete categories, when you go into the page and edit it. There'll be a little section for categories around the bottom right area, and you can manually delete them there
(i'm really sorry about all this, i'll change their text in the other pages that the cards appear in after you guys managed to rename the files!)
i only took a closer look at their cards ingame now, and i noticed the difference from their event detail website;;;;; the in-game one should be correct one cause they haven't made any announcement and their names would make more sense the other way round with the story OTL OTL OTL
Sorry to keep causing so much trouble with the card names due to my carelessness OTL OTL I'll double check both the game and their website information next time!!!