Just checked, and it is a library thing apparently. If I view the folder via the Library, I can sort it properly. But if I manually go to the folder, I can't. You can tell by looking at the top right corner. In the Library it has "Arrange By" and several options. Outside the library is a set of icons for displaying icon size/layout. You could always put the networked drive into a library, although you need to enable indexing on the file server to do that.