data omission when reading folder by sklearn.datasets load_files

I'm trying classification and clustering by sklearn. To load data text files, I used codes like this.

categories = ['Business', 'Entertainment', 'Living', 'Metro', 'Shopping', 'Sports', 'Tech']

data = load_files(container_path= "C:/Users/정주영/Desktop/SNU 2-2/데관분/DMA_project3/CC/text_all",
                  categories=categories, shuffle=True, encoding='utf-8', decode_error='replace')

enter image description here

In this folder, there are definitely more than 10 files. So I can't understand why this code reads only 5 datasets that has no relations!