Really Upset

It might be helpful, and less frustrating, if the OP got some basic training in using Photoshop.

Linkedin Learning have terrific step-by-step online video tutorials and offer 30-days free access!

https://www.linkedin.com/learning/photoshop-2021-essential-training-the-basics?trk=learning-serp_learning_search-card&upsellOrderOrigin=homepage-learning_learning-search-bar_search-submit

I've read your post twice and don't understand your issue. I've never had a selection process stop on me when the program wants to, rather than when I choose.

If you want help from other users on this forum (we are volunteers, we don't work for Adobe) please describe the exact steps you are taking , using screenshots to show what is happening and describe what you expected to happen.

Dave

Hello, Alessandro, I see that you are quite upset, and it is understandable when thing don't work as expected.

That said, you are adressing other users here, but we could still help you before you try to reach Adobe directly.

We could only help you if you gave more information, as many parameters could influence what goes wrong or not.

Pleasepost the contents of help>system info, so that we get to know your OS, its version, the exact version of Photoshop you are running, the date of the GPU driver, etc. Tell us as well, if you are on a PC, if you use a graphic tablet, which one it is, if you use wintab or windows ink.

Also, could you post a screenshot of each of the different problems, there might be a wrong setting somewhere, so make sure to have the layers panel, the option bar, the titlebar of the document. a video would be a good idea as well.

This is a user Forum, so you are not really addressing Adobe here, even though some Adobe employees thankfully have been dropping by.

But even aside from that the tone of your post seems inappropriate. 

Please read this (in particular the section titled "Supply pertinent information for more timely and effective answers”):

https://community.adobe.com/t5/using-the-community/community-how-to-guide-tips-amp-best-practices/td-p/11601738?page=1

As for 

»BLACK ON WHITE .. B L A C K O N WHITE«

Sky Replacement is not intended to select black or white but »skies«. 

»Also is really upset than a manual selection automaticcaly close the selection when the program want and not when I WANT!!!!«

What is that supposed to describe? 

If you want to have a meaningful discussion please post meaningful screenshots (including all pertinent Panels and Bars) to illusztate the issues you are having.