The "Display missing episodes within seasons" and "Display unaired episodes within season" options are broken and being forced by default.
I have both of these unchecked in my user Display setting, but they are being forced regardless of being checked or unchecked.
I'm running version 3.0.8300.0 of the docker container on Linux, I updated last night.
I also had Hurricane confirm this issue with another EMBY docker setup.
So it's not just me.
If you look at the screen shot I have both options deselected, however EMBY is displaying content that does not exists on my Hard Drive