I don't have a chance to check Notepad (I'm not on windows, so I don't have that), but I guess with "ANSI" they mean "the appropriate local charset for whatever language this computer is set to", which would produce Big5 or some variant of it in your case, so that's what you should use. Again, this is just a guess.
The broken lines from the .txt file you posted (if I load it as Big5) are:
5574,Pencil_In_Mouth,叼在嘴?媢]筆,4,20,,100,,0,,0,0xFFFFFFFF,63,2,1,,10,0,555,{ bonus bDex,2; bonus bHitRate,3; },{},{}7156,Broken_Shuriken,破舊之手?媦C,3,470,,10,,,,,,,,,,,,,{},{},{}(I wrote #5571, but I meant #5574, sorry).
The questionmark is there to say that it wasn't able to load some character, I'm not sure why it happens.