A mapped domain has disappeared

I have a multisite, with a domain mapped to a current website. Last week the domain disappeared, image of this page is attached.

I investigated with my host, who said that although it was in my account, it was no longer assigned or parked. So I re-did this just now.

When I went to tools for that site, the domain mapping reports it as being valid. I removed and re-added it again because it is still not showing up. When I added it again, I noticed that there are now 3 choices on how I can redirect it. I picked the one that is shown in the 2nd image.

Help! Thanks in advance!