The web site uses the palette from the last chunk for the screenshot

[vsariola]

When adding a cart to the website:

If bank 0 of the cart has a screenshot using a palette in bank 0, but there's also a palette in bank 7, the website uses the palette from bank 7 for the screenshot. Perhaps the website uses the last available palette, I am not sure.

The website should probably use palette from the same chunk where the "import screen <file.png>" command stores its palette.