Are Workshop items downloading twice?

I noticed when gmod is closed and I subscribe to something in the workshop, lets say a 5mb addon Steam downloads 5megs and when I start gmod it downloads it again. Am I misinterpreting whats going on? I’m using the Linux version.

Thanks.

They Might be, But don’t worry, They don’t take up extra space, it it is downloaded twice, it over writes the file.

The Steam download of addons is pointless, it doesn’t actually download anything.