I am creating an HVAC zone color fill, and I am having problems with it.

A few zones are not filling the color properly. I have attached an image to help you see my problem. (link here, or see below: http://i.imgur.com/cGDwh.jpg)

As you can see, the surrounding zones are filling in just fine, but the zone that contains the Break Room, Locker Room, and Toilets is just showing a small rectangle of color instead of filling the entire zone.

Any help would be much appreciated.