So I tried the 'roughly next to each other' method. Then I used the side-by-side alignment. But still get the same misalignment. As you can see the back of all the furniture perfectly align with each other... but not the front eadge...



Here is the furniture size;




I didn't change them, I simply put them in my plan and aligned them... I really don't know what's going on. I have the latest Sweet Home and your latest Kitchen library...