Importing image turns it into a background layer?

I am trying to import and image and it brings it into Aseprite as a background layer.
I then convert to normal layer and it loses some of the colors throughout the image.
I try to select certain portions of the image (the head) and then copy paste to another layer and it does the same thing and gets rid of some of the colors throughout the part I copied…

Anyone know what I am talking about? Anybody know how to fix this? or a workaround.

Thanks