We also had a coffee table that had a mirrored lower shelf that reflected up onto the front of a leather sofa. The customer called claiming we bleached out the front of the sofa. The sad part is I sent a crew out to check it out and they said they couldn't do anything with it.
I saw the problem the second I walked into the room. The customer didn't believe me, so not only did I have to move the table and "fix" the bleached area, I had to tip the sofa on it's back so they could see that the front was indeed the same as the rest of the furniture.
Like others have said, it is funny how these things are not noticed until after we clean!!