Orthodox canon confusion regarding Ezra/Esdras

Hello All, I was looking through a copy of the OSB the other day out of curiosity and was confused regarding the situation with Ezra/Nehemiah. In my RSV2CE, we just have Ezra and Nehemiah. In the OSB, they have the following listed- "1 Ezra, 2 Ezra (Ezra), Nehemiah". So am I correct in assuming that the 1 Ezra included in the Orthodox canon is not in the Catholic canon? Thanks and God bless.