I have Office 365, and I'm using Microsoft Word. I guess it's version is Word 2013. I created a style called "test", then decided to remove it. When I try to create a style with the same name, I get a popup message saying:
"The style name already exists or is reserved for a built-in style".
But the style isn't there anymore. When I removed it, I saw it disappear from the ribbon Styles section.
Can anyone try to do what I'm doing and see if you get the same problem?