MultiDB 2.8.5 when moving db to another server the db.php uses the old server.

Ok, so.

We installed MultiDB, works like a charm.

Now we're upgrading the servers and are moving the databases to a MySQL cluster, when doing so we move one database at the time, and with the first db it fails.

The config looks like this:
add_db_server('27', 'dc1', 1, 1,'','10.9.5.4', 'database_27', 'user', 'password');
add_db_server('28', 'dc1', 1, 1, '', '10.9.5.20', 'database_28, 'user', 'password');

We're using 256 dbs, and we wanted to test with database_28, so we disabled it by changing password, moved the DB to another server and changed the config, saved and restarted PHP and Nginx.

Now; Wordpress is still using the OLD database server.

It seems like something is wrong, perhaps a bug? Any ideas?

Br
Andreas