I never thought I'd ask a dumb question like this.
I was trying to change a .css file to .scss, so in the contextual menu I select
rename and change the extension name fro
scss, after I click elsewhere, the file name become
.scss.css. Moreover, when I ^click the file again,
rename dissapears in the contextual menu.
Some aspects of Mac OS are so counter-intuitive and frustrating.