Bloc-group with images as background

Hi community,

maybe one of you had the same issue:
I am buidling a website with blocs set on fullwidth with an image as background. Some blocs are alone, some in groups by 2. I have set the padding to 0 as the headlines are an overlay and aligned to the upper top.

While duplicating the group and trying to style the duplicated one all of the adjustments are mirrored to the original as well. Is there a workaround?

To work with the custom classes is a pain in the ass as I need to adjust everything on all devices (i tried that already :disappointed_relieved:)

Thank you in advance