Yeah - sometimes shark names can be confusing.
Dogsharks/Dogfish - have been used to describe many species of sharks - from Squaliformes (true Dogfish) to Triakidae (Smooth hound sharks) to even a few species of cat sharks - such a the Chain "Dogfish"/Catshark.
Like wise the term catsharks is used to describe actual catsharks of the family Scyliorhinidae as well as Long-tailed Carpet sharks such as Bamboos & Eppies.
Personal I think it's best to call a Catshark - a Catshark, A Bamboo - A Bamboo, a Dogfish - A Dogfish, & A hound shark - A hound shark. Don't attempt to mix them up - only adds to the confusion.