Bino
Slowly, slowly, catchy the monkey!
As AM says, the Kosher version of Office X has no .sit files. To get rid of it, simply dragging it to the trash won't do. Part of the Office suite includes 'Remove Office' (Applications - Microsoft Office - Additional Tools)
This'll get rid of all the hidden files you can't see.
If you want a talk through for the rest of it, send a PM.
Trips