Problem:

I want the LOWEST item in each taxonomy branch.

e.g. if a post is tagged as "Asia / Thailand / Bangkok" I want it to return "Bangkok.

Solution:

There isn't such kind of built-in feature within Toolset plugins, You need to edit that post, assign it with only one term.

Relevant Documentation:

Problem:
The issue here is that the user wanted to hide his filters that won't produce a result on their view.

Solution:

Assuming here that you are using a Blocks setup for your view then you wont be able to do it from here as this setting isn't available for the Blocks view setup.

You can only have this option when you're creating the view using the classic editor.

If you're not using the classic editor you can enable it by going to Toolset -> Settings and scroll down to Editing Experience and enable the 3rd option.

Once you've done this you go to Toolset -> Views to create your classic views.

On your classic view you will scroll to the Custom Search Settings then select "Let me choose individual settings manually" then scroll down to "Show only available options for each input" and from there you can select Disable instead of Hide.

Problem:

The issue here is that the user is getting the communications error message on their dashboard even though their site key is correct.

Solution:
Please try to register your site using the tutorial below.
https://toolset.com/faq/how-to-install-and-register-toolset/#automatic-installation-once-you-have-types-plugin-installed

Once you've done this check again to see if the issue still remains.

Should it still remain, go to Dashboard -> Updates and click on the Check Again link and this should resolve the issue.