Probably because you have a subtitle - that is the only thing I kno9w of that incurs a $2 fee. And that would apply every 30 days when the listing ticks over.
You can only edit the listing duration for a very short time after you list. Although I thought you could reduce the duration. Maybe those listings don't have that much time left? If you can't edit the duration you will need to end them and sell similar.
