as you so clearly say, BB, a person with the handle 'yannek' created the textures, under commision , i would presume. so, the problem with the texture is because the creator did not take the texture a few pixels outside the uv map. i have no argument with that.
if there is a problem with a texture and names are mentioned, the creator 's name or none should be stated. not having a dig at a company for the sake of it.

i am sure if these seam problems had shown up in testing, they would have been sorted before release.
as a company, they are a marketplace, they buy some products, commission some, and they sell products on a commission basis. they do not create content.