the phantom prize

I really know what i did it here, and just today i discovered that it's also a listed and known bug... so no garbage here.
Besides, in the case you'll record my current task, you'll see that the boss drops thunder blade or jewel ring(they're not his drops!), so i'm 110% sure about that.

Edit: oh, i got what you meant! if that's garbage, then i wanna know what's this garbage and if i can manipulate without breaking anything, especially because CotG might be full of those situations and i don't wanna be forced to take in consideration what are those 2 items in my hack and possibly avoid to increase further the size of the AI of my monsters, just to be sure to avoid the death of mosters that won't be in the same slot of a changed formation...