I have build 21 and I'm seeing the same issue. It manifests itself in two ways:
1. I use the edit icon to change the scheme, then when I save the edit panel and refresh the main stats page the main oage still shows 'def' inthe scheme column
or
2. I use the edit icon to change the scheme, then when I save the panel and refresh the main page it shows the correct scheme BUT, if I re-click the edit Icon the edit panel shows 'def' as the current scheme.
This affects the SE, bookmarks, notrade and noref rows
I have multiple installations at build 21 and I see the same behaviour across them all