Two sifrei Torah on the Bimah

On a day when two Torah scrolls are used, they should not open the second one not remove it's cover until they roll up the first one. Rem"a: And they should not remove the first one until they placed the second one on the table, so that they do not get distracted from the mitzvah. And they should take out both Torah scrolls at the same time, and they should hold the second one until after the reading of the first one. (Ohr Zaruah in the name of the Yerushalmi)

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There, we have stated: “One skips in prophets; one does not skip in the Torah.” “One skips in prophets,” but one does not skip from one prophet to another, except that one is permitted to skip between the Twelve Prophets. “One does not skip in the Torah.” Rebbi Jeremiah in the name of Rebbi Simeon ben Laqish: Because one does not scroll the book of the Torah in public. Rebbi Yose asked, think of it, if it was a small paragraph? But so that Israel should hear the Torah in due order. But did we not state: “he reads after the death and but on the tenth day”? There is a difference since this is the order of the day. You should know this, as Rebbi Simeon ben Laqish said, one never recites from memory but here he recites. Rebbi Yose ordered Bar Ulla, the beadle of the synagogue of the Babylonians: If there is one Torah, scroll it behind a curtain. If there are two, take away one and bring the other.

“One does not skip in the Torah.” Rebbi Jeremiah in the name of Rebbi Simeon ben Laqish: Because one does not scroll the book of the Torah in public. Rebbi Yose asked, think of it, if it was a small paragraph? But so that Israel should hear the Torah in due order. But did we not state: “he reads after the death and but on the tenth day”? There is a difference since this is the order of the day. You should know this, as Rebbi Simeon ben Laqish said, one never recites from memory but here he recites. Rebbi Yose ordered Bar Ulla, the beadle of the synagogue of the Babylonians: If there is one Torah, scroll it behind a curtain. If there are two, take away one and bring the other.

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