Multiple curves move / series

Hi,
I am trying to move multiple offset curves by the same steps in series to make holes into the surface (like contours for the CNC or something like that). It makes me only for the first one, but not for the others (but offset was working fine). Tried graft and other tree operation, but obviously wrong way. Thanks for help.

GH steny 02.gh (16.4 KB)

GH steny 02.gh (16.8 KB)

Thanks a lot!