Brody was the same way. It took him about 3wks to start to get the hang of things. He does better at night when he's confined to his xpen and has no other options of where to potty. During the day when he had free roam was our challenge. He's getting much better with the occassional slip. He just seemed to suddenly catch on that he's supposed to do both potties on the same pad.
We did start to notice he was having more pee accidents on our carpet. It appears that he doesn't like to use the pads more than twice. And boy does he like to pee. LoL Luckily, we use the washable pads.
So maybe your little guy needs his pads changed more often too?