Concerning your last question: It is totally useless to have these blocks if you do not give the setting a value.
Then, this is my last attempt to answer your earlier questions. If this does not help, I cannot help you.
I made two different answers, one where I tried to use the setup of the .aia you upload:
Basically,
if you press button1, the text of textbox1 is made visible and the text of textbox2 is made invisible
if you press button2, the text of textbox1 is made invisible and the text of textbox2 is made visible
The other solution uses one label, which would be better if the user should not be able to change the text. And it uses a list with 2 items.
if you press button1A, the text of item 1 in the list text2show is put in label1
if you press button2A, the text of item 2 in the list text2show is put in label1
Here is the design:

And here are the blocks:

Be happy. Cheers, Ghica.