Hello @Jennifer286,
The only way to stop getting your host's emails is to have him remove you as a co-host.
The email notification settings on your host profile apply to emails regarding your hosting only.
If you set this to disable email notifications and are acting as a host in your own right, then you should nolonger get emails regarding your hosting activities with your own listing.
You are a co-host. The co-host feature description states that the co-host receives the guests' communications that the main host receives. This is because the feature implements quite a close host to co-host arrangement where the co-host can communicate with, greet and review the guests.
If you are not involved with the host's listing while he is there then he should remove you as a co-host and re-instate the co-hosting only while he's away.
What can a co-host do?
Steve.