They are blank because they were not defined properly in the Description.ext. If the name quotes are left empty, there will be no text to describe what it is you're using. The original campaign has done this to some of them and so getting rid of them is not possible.
class hello
{
name = "";
sound[] = {"\sound\hello.ogg", 1, 1};
titles[] = {};
};
Those blank spaces still work, just select one and set the trigger to true in the condition field and place it on top of you. You'll here and see the text that was affiliated with it. Affiliated text is declared with the titles line.