few years back, one of my relative used 2 addresses, one po box address in ktm and other one from his village address. the second one he applied using the village address got selected, now he is in us. these days computers are updated, networked and up to date and they can easily fiindout any conflicted application which matches name and date of birth or so. if there are name and date of birth is matching, they process your application manually after they find difference on your pictures. they validate the pictures not only looking at them how it looks but there is some kind of method on which they findout the structure of your facebone, structure. I do not recommend anyone to sumbit multiple application, that will only disqualify your all applications.