As far as I know that last line should mean that all automations should be hidden from Haaska, but when I discover devices in Alexa they’re all still showing up.
I guess you could double check you don’t have other entries named the same/similar in your config file.
I know when I set it up I realised I had some groups named the same as switches, scripts etc. So had to go through them all to make sure I excluded everything I didn’t want to see.
Yep, there’s just one group named all_automations, if that’s what you mean. If you mean there are some scripts and automations that share the same names, that’s true, but I can see whether or not the entity is a an automation or a script in the Alexa app.