Got the same impression.
For me, it mentions every thing you obtain and every thing you change after you change professions. I'm inclined to look at the whole "assuming of a different Job" thing as ability-related mimicry. This system does not allow for multiclassing at all, so literally you would always be a Freelancer, and therefore gain a Destiny point.Also, under Job Change, it says the freelancer "obtains" the new innate ability, not replaces theirs.
I know there were more sound arguments in the history of philosophy, but it's one strictly logical way of looking at it.