FF3usME Spacing Issue

I seem to be having a problem with the FF3usME program in that when I try to rename a spell or ability in the Spell/Esper editor, I seem to get an extra 'space' when I rename it to something that uses two words. To illustrate:

The ability name is "Risephenix"
I want to rename it back to "Fire Dance"
There seem to be several options for a 'space' as you can see here:



Some of them create odd symbols in-game, resulting in "Fire#Dance" or something else, but the most common issue I end up with is two spaces, resulting in "Fire__Dance". (underlines added due to two spaces being automatically fixed)

How can I reliably add a space between words?