Weird glitch on recoloured objects?

yeah I saved them as DXT5 DDS, and even tried .png but the glitch still happens, and the textures are the original size they exported as.

No, I don't have any standing still mods (I do have a CAS background mod and some poses), Here's the link to both the tank top and hairs Here Ya Go
1:
I export the texture
2:
I open it in Gimp (I don't have photoshop)
3:


Then I use the Colourizing tool
4:


Then expot as a .dds file (BC3/DXT5 sometimes as a .png file but not this time, the shirt i saved as a .png file)
5.

and then I Import and save the package file, move the file to my mods folder and check it out in game.
I do it as I have always done, and it was fine nothing wrong, but now as you can see, this glitch happens.
Here's how it looks in CAS:

Now in game: 

(P.s just need to say your profile pic is beautiful )