Neither Jerome nor the Vulgate were inspired, infallible, nor verbally perfect. Here's one place.
Yes, I agree. The Vulgate is sufficient for us, the Church teaches, but one always must refer to the original Greek. Note however that the original Greek is somewhat of an abstraction as the extant copies are incomplete and differ a bit. It is logical to assume that St. Jerome, who worked prior to the Muslim occupation of Palestine, had access to the codices now lost.