Stoetzman on "[Plugin: Autoptimize] Multisite?"

I've just realised, the Cache Info shows on all sub sides as followed:

Cache folder: /home/..../public_html/..../wp-content/cache/autoptimize/9/
Can we write? Yes
Cached styles and scripts: 0

And here the main page:
Cache folder: /home/..../public_html/..../wp-content/cache/autoptimize/1/
Can we write? Yes
Cached styles and scripts: 12

funny, isn't it...?