Regarding the grindstone. I don't know if it can have any effect, but your texture seems to be saved with an alpha channel (just white) and the vanilla texture doesn't have that channel.
Also, I noticed this texture conflicts with the Skyrim HD Texture Pack. Maybe there's the problem.
//Edit: Btw. I can't open your blacksmithsharpeningwheel01.dds texture with AMD's The Compressonator. I think this points to texture corruption when you saved it.
Another conflict with the HD textures is this texture:
Textures\Armor\Blades\BladesArmor.DDSfrom this fix:
Fixed clipping on the skirt and Pauldrons and fit the belt to its alpha on the female Blade CuirassI know USKP won't release fixes based on the HD texture, but for personal use I tried to apply those fixes on the HD textures myself.
For the blacksmithsharpeningwheel01.dds I loaded it with the PS DDS plugin (Load using Default Sizes and no options checked) and changed only this, as I didn't notice any other differences:
http://img692.imageshack.us/img692/1999/blacksmithsharpeningwhe.jpg
I saved it as DXT1 RGB 4 bpp | no alpha, Generate MIP maps and left everything else as default.
For the BladesArmor.dds I loaded it with PS the same way, then copied the alpha channel from the USKP texture, scaled it up to 200%, rotated it 90° CCW.
I saved it as DXT5 ARGB 8 bpp | interpolated alpha, Generate MIP maps and left everything else as default.
Please tell me, if I did something wrong

Last thing I noticed:
For some reason there's this archive included:
meshes\architecture\farmhouse\interior\farmintinnend04&6.7zOversight?