When the Sorento was in 2014, the crash dummy didn't have an easy time of it, almost missing the front airbag and suffering nearly a foot of intrusion in the footwell. That earned it a "poor" mark.
The 2016 Kia Sorento model did much better, with the dummy properly restrained, proper airbag deployment, and just four inches of intrusion in the footwell, all of which was good enough for a "good" rating. Add that to the good ratings it's received for all the other tests, the Sorento's overall status is elevated to Top Safety Pick. You can check out video of the small overlap test below.