I used an FO once that was advertised for soap and had some testing notes and reviews. It was supposed to be a pine/spruce smell, but it wound up smelling like fruity pebbles about a week after I cut it. I wrote to the company and told them what had happened, figured it was something they'd want to know about, and they replied to me saying it must have "flashed", but I am not sure I understand what that means.
I've also had FOs that smelled great OOB, then were horrid and medicine-y for weeks after cutting, only to become tolerable 2-3 months later.
It's so disappointing when a FO morphs, and I totally get wanting to immediately do something constructive with the offending bars, but I agree with everyone else, wait a WHILE, you might be surprised.
And if its still stanky after several weeks, then you know that rebatching would probably have compounded the issue.