Okay, I can see the content of the file now, and it appears that the
characters (forgive my language ignorance if they are not characters) are
indeed in the file twice.
Could you tell me more about how you enter such characters please?
-> Enter the Korean characters just beside the English titles by putting the
English/Korean toggle key into Korean at the keyboard.
Do you have a keyboard with them?
-> Yes, there is a English/Korean toggle key with the keyboard.
What do you see on the screen when you enter a character - a single
character or two?
-> I see two characters of all characters input beside the last character.
What is the first point at which you see the double?
-> The first character of my input.
Can you open the template again and delete one of the duplicated characters?
-> Yes, I can open the template again and delete one of the duplicated
characters.
Does it come back again?
-> It comes back again as it was. That is, it comes back with duplicated
characters when it wasn't corrected, and it comes back with a single
character when it was corrected.