I think there are 2 different issues here.
One issue may be my mis-understanding of CCS or the Designer.
1st Issue... when you change the value of a radio button... is it suppose to change the ID.
In the video, you will see the ID change to No-2... keep in mind... I have nothing on the form with the ID of "No".
The 2nd Issue....
This issue very difficult to describe and reproduce.
So far... from what I can tell... it centers around the Radio Button Label.
A radio button is actually 3 different elements combined.
The Radio Button Field (wrapper)
The Radio Button
The Radio Button Label
You can change the Group Name and Value by clicking on any of the 3 elements that comprise the "Radio Button".
However... (not fully tested yet)... it seems you can get a different value if you click on the Radio Button Label and change the values.
When you do this... the ID will change also.
The problem is... if you then click on the Radio Button and change the value... it adds a "-2" to the end of the ID.
I'm still working this issue... trying to replicate it.
As I mentioned... this is a very difficult one to track down.