Both are correct, but you are listing different years. The acceptance rate by year is summarized below. Admit rate dropped from >30% to 13% in just 4 years. If the decrease continues, Tulane may be a sub 10% admit rate school next year. This pattern partially relates to improving need based FA at the cost of reduced merit aid.
Class of 2019 – 30.5% admitted, 3.51 Mean GPA
Class of 2020 – 26% admitted, 3.52 Mean GPA
Class of 2021 – 21.5% admitted, 3.56 Mean GPA
Class of 2022 – 17% admitted, 3.56 Mean GPA
Class of 2023 – 13% admitted, ??? Mean GPA