Sentence Correction

Note: Dependent & Independent clauses will be covered later in this book.The most common subordinating conjunctions are after, although, as, because, before, how, if, once, since, than, that, though, till, until, when, where, whether, and while.
The line quoted above is from Sc grail.
I find that relative pronouns like that , when and where have been included as Subordinating conjunctions.
Isnt it wrong ?
Am i violating copyright issues . Lemme know i ll delete