AI generative fill not creating clouds in sky

I had to recreate my attempt at adding clouds to the sky of a black and white image.  Exactly what you see below is a little different than what I saw yesterday when I was working on this photo.  This first screen shot is what I started working with.  Not quite all of the layers are visible in the layers panel.  There's a B&W layer at the top of the stack.

The next screen shot shows my request to add a few high-level cirrus clouds to a portion of the sky.

And here is the resulting fill:

This is somewhat different from many of the results I received yesterday, but it still illustrates the problem.  First the clouds are cumulus and not cirrus and they are not along the top of the image.  They fill about 80% of the selected area.  Second, the Generative Fill added more mountains above the ones that existed before the fill was performed and are now blocking some of the sky. The ones added today are a bit more consistent with the real mountains in that location, while yesterday's were jagged, rocky peaks.  Third, there was a strange object added to the top of the outhouse and the lettering on the sign over the door that said "Shown by Appointment Only" has been changed to something that is not recognizable.  The outhouse was not in the selected area to be filled.  I will add that the instructions I gave to Generative Fill for this example are not exactly the same as what I was telling it to do in yesterday's attempt, but the general nature of what I was asking for is the same.  The other Generative Fill layers you see in the layer stack worked quite well to remove things that I did not want in the image.  For those Generative Fills I did not give instructions for what I wanted.  I just selected the area I wanted "replaced" then clicked on the Generate button and let it do its thing.

I'd appreciate any thought you might have about the way I'm trying to give instructions or whether I'm expecting the tool to do more than it's currently capable of doing.  

    Bill