[root@www ~]# config show letsencrypt
letsencrypt=service
signal-event=console-save
I don't think this is in the documentation (a reason to read really carefully)
At some stage you have messed up commands. You probably did this:
config setprop letsencrypt signal-event console-save
It won't do any damage but better to remove it like this:
config delprop letsencrypt signal-event
Make sure it has gone:
config show letsencrypt
Then just update to make sure:
signal-event console-save
Once you set it from 'test' to 'enabled' you did run dehydrated again - as per the wiki - to force it to generate 'real' certificates instead of 'test' ones?