I had similar issues. Here is how I resolved.
1) Click My Servers
2) Click Atlas Icon
3) Basic Settings - wait for to load
4) Change server name to something unique to make it easier to search.
5) Click Save
6) Restart server
7) Once online give it 5 min
9) Click Join New Atlas
10) Click the drop down change to unofficial
11) Make sure password protected is selected
12) Type in case sensitive server name
Main thing here is making it easier to search and giving it time after restarts to appear.
I had to sit in search page 1-3min as well.
I have a unique server name, though, and was searching under the "unofficial" tab