"Sections" dashboard not taking full length?

@mirekmal thanks a lot for the reply, but as it concerns the grid-layout, can you please cut / past your comment in the link I posted in last post (https://community.home-assistant.io/t/layout-card-take-control-of-where-your-cards-end-up/147805/932) ?

I will rely from there.
thanks again for your help