The DRB annotations are literally the exact opposite of Sculfield's, ironically, which is why I recommend it. The truth is, a lot of the bible is incredibly figurative while other parts are incredibly literal, and the average person simply wont be able to tell which is which on their own. (In fact, midwit translations like scofields are evidence of this).
Judging by his early life, I think he was just a useful pawn who was intelligent enough to provide a translation for his masters, but too stupid or maybe just greedy to actually bother seeing if the translation was correct