DDBlock in homepage through panels not correct aligned

Issue Summary

Hi,

I have panel-panes on which I show DDBlocks and nodes next to it.
When I show nodes next to each other they are correct aligned, but on homepage when I put a DDBlock instead of a node, the alignment goes corrupt.
When I put eaxctly the same panelpage not on the homepage it is correctly aligned...

Thanks for going into this!
Greetings, Martijn