Follow up Question about removing Wallpaper on MacBook

I

iMore Question

Hi,

I had asked if it was okay to remove some of the pictures stored in -
MacHD>Library>Desktop Pictures, and was told it would be fine.

I just started deleting some of the ones I do not like and noticed something odd. The spaces those icons were in, are now just black spaces.. It removed the icon(picture) but the other ones did not move over to take their spots.

So now in that folder I have "Blank Spot" then Antelope, "Blank Spot" then Beach... and those are just the first few.

There are other (holes) where the pictures used to be. I have not dumped my trash in case I need to put these back.

Why did it not rearrange the icons/pictures after I removed the ones I did not like??

Is this normal?