Cleaning new boots

[OpalFruits]

I recieved my new pair of leather riding boots today and went to clean them with some leather waterproofer and found the black rubbed off onto the sponge.

Just wondering if this is normal?

 

[its_noodles]

doesn't sound normal to me. what make are they?

 

[OpalFruits]

The Kinpurnie St Andrew boots