The 500G docker.img was because I was troubleshooting something and I forgot to change it back, thanks for reminding me.
As to the docker and vm not on Cache, I am unsure, I don't remember changing anything but it could be because I only installed the Cache later down the track. Though I believe some of the Vdisk.img are on there. Any hints on remedying that would be appreciated.
The Cache also gets used for when dumping files onto the server as fast as possible, so that I can get them in a second location after I for example pull footage off a camera.