Gallery not full width in full width row

[Goldenone]

As you can see the gallery finishes before the black bottom portion which is the full width of my screen.
The only way to make the work full width is to set it to 5 columns and under but that breaks the purpose offering 6-7-8-9 columns option.

Here is with 5 columns
http://puu.sh/qWCkM/e8db0eb987.jpg

Here is with 7 columns
http://puu.sh/qWC0D/f14697d788.jpg

Ticket