ADV in sidebar – alignment problem

Hi
I inserted my Google DFP codes into the themes but I’m having problem with the 300×250 box in sidebar

in the homepage and categories the alignment is correct (I’m using the same adv box for all positions) (see here: http://www.green-planner.com/)

in the posts sidebar instead is aligned to the left and is not centerd (see here: http://www.green-planner.com/2015/09/08/hello-world-1)

I can’t figure out why

can you help please?

thanks
Paolo

Hi I detected the problem just with dfp ads
so it’s not a theme problem… keep investigating why this happens