Hi,

This is because of the UV mapping. In the vertex modeling room you can engage the UV editor (x,y,z for 3D space and U,V for 2D texture space) In the UV editor you can reposition the mesh to fit within the UV space. There is much more that you can do with it. 

First check the manual out for an introduction and see if that gets you going. 

I actually have a solid introduction into UV mapping in my C7 Pro tutorials if your interested. I know that the Infinite skills are good but we cover different subjects between the two of us. 

Mark