When I drag a User component into my project’s stage, the component’s CSS file gets added a second time, with a -1 suffix (eg, my-component-1.css). This shouldn’t be necessary because the project already contained instances of the component and the .css file was already in the project.
I’m sure this is my fault. I work on two different computers which may have differing configurations. I may also have edited the wrong .css file at some stage, creating a version management issue.
I could probably work out the exact circumstances in which BSS creates duplicate *-1.css files by trial and error. But if anyone already knows those circumstances, you could save me the time!