I was gonna through an edit but I don't have time. You used the wrong "there" a few times," their" is the one you were looking for which indicates possession.
I'm not positive on this but I think you use the semi colon a bit too much and maybe not correctly in each instance. A semi colon brings together two independent thoughts that could, in and of themselves, stand alone. The easiest way to tell if you're using the semicolon properly is to simply see if the thoughts make complete sentences upon separation. I'll try to find an example.
http://theoatmeal.com/comics/semicolon