Options fieldtype and inputfield dependencies with multiple conditions

[Henrik]

In the Admin I use a "fieldtype options radio button (single value)" to display different fields depending on which radio button is clicked.

My issue in short is, that I get it working with one radio button. But not if I use two which are nested.

Let me explain:

This is the fieldtype setup for the radio button:

If I want a field to only display if the 1. radio button is clicked I specify his "show if - behavior" like this:

This works like a charme. No question.

But if I add a second radio button (pair) with the following setup:

... which only shows if the 1. of the first radio button (pair) is clicked,

like this:

I get in trouble ... Btw this second radio button (pair) should allow me again to display different fields dependent on which radio button is clicked. Lets say I want to display a field only if the 2. of the second radio button pair is clicked - and therefore the 1. of the first radio button pair has to be clicked before, I thought I had to do this:

But this doesn't work! The field is always displayed, also if I click the 1. of the second radio button pair.

So how can I assign these multiple conditions correctly?

Thank you for any hint on this