So far Double Spell works on other spell cards but when I try and use it on Dark Magician Curtain in my opponent's grave my Dark Magician won't appear. I can click on it to summon it but it never appears on the field. I'm not sure if this is a bug in the multiplayer but it is in the AI. I've tried it multiple times and my life points are halved by the card's effect and I can choose which dark magician to summon but it just won't appear. please help.