Interesting. Looks as if the "problem" is in the model. Apparently the .obj file (Art of Illusion) maps marble2 to use a small part of the 200x200 px marble texture (2DoorLowerCabinet1.jpg). That is annoying, at least in your case. But at least it seems you have several options:

1. find another model, Lower cabinet by Luca Presidente scales the worktop texture differently,
2. edit the texture down to have all the tiles in the visible area,
3. use another worktop (box model) on top of the cabinet (and group). If you want to remove the existing worktop, just apply an invisible texture,
4. edit the .obj file (or make your own),
5. ignore and not loose any sleep...
   [/list=1]
   
   But at least it is a lesson learnt when you pick models for your new kitchen... Good luck.
   
   ok