Desktop unable to do git add new folders

I used Desktop to create a private repository and then I dragged some folder in the project root folder. I was expecting these dragged in folders showed up in Changes. Yes they did, but all named with a redundant character ahead, like this: a folder named hello_world becomes hhello_world. And when I expanded the wrong named folder, it says the file is empty. I deleted folders and then repeated the above steps, it’s the same. I added a .gitignore, and commit and push. Now only this ignore file in Github repository. I used desktop to do git add and commit before, this is the first time, is it corrupted or I missed something.