I was recently Optimizing my Adsense for my blog

www.dxbunderground.com/blog

Before the there used to be a head banner on the Header and a wide sky crapper on the right .

I removed it and now I plan to Place Square Boxes in middle of my posts

The placements work fine .

But the problem is , its showing totally irrelevant ads now . That was not the case before .

What am i doing wrong ? Is it the blog descriptions or some meta something ?

any one can help ?