It does seam to be case sensitive! Creating two files called a and A works. They even show up in explorer. It doesn't work to delete one of them from explorer

It does seam to be case sensitive! Creating two files called a and A works. They even show up in explorer. It doesn't work to delete one of them from explorer though. No errors - they just reappear. After trying, I now have a file called a that I can't delete from bash or explorer!