אי אמרת בשלמא במערבית דרומית הואי היינו דמתרץ לחם הפנים אלחם הפנים אלא אי אמרת צפונית מערבית הואי סוף סוף מאי תירוצא דלחם הפנים אלא לאו שמע מינה במערבית דרומית הואי שמע מינה
Granted, if you say that the Chamber of the Lambs was actually closer to the southwest corner, that is how Rav Huna resolves the contradiction between one mishna discussing the shewbread and the other mishna discussing the shewbread. However, if you say that the Chamber of the Lambs was in the northwest corner, ultimately, what is the resolution with regard to the shewbread? Even if you envision the path from the other direction, the Chamber of the Seals interposes between the Chamber of the Lambs and the chamber where the shewbread is prepared. Rather, must one not conclude from it that the Chamber of the Lambs was indeed in the southwest? The Gemara concludes: Indeed, conclude from it that this is so.
והאמר מר כל פינות שאתה פונה לא יהיו אלא דרך ימין למזרח הני מילי בעבודה אבל הכא חושבנא בעלמא הוא
The Gemara questions the assertion that one tanna envisions the chambers as one coming via the left. But didn’t the Master say: All turns that you turn should be only to the right, which in certain cases is to the east? Here the turns are to the left. The Gemara answers: This restriction applies only in the course of performing the Temple service; however, here, it is a mere reckoning, and no priest actually proceeded that way from one chamber to the other.
שכהן גדול מקריב חלק בראש ונוטל חלק בראש תנו רבנן כיצד מקריב חלק בראש אומר עולה זו אני מקריב מנחה זו אני מקריב
§ It was taught in the mishna: As the High Priest sacrifices any portion that he chooses first and takes any portion that he chooses first. The Sages taught in a baraita: How does the High Priest sacrifice any portion that he chooses first? If the High Priest so desires, he says: This burnt-offering, I am sacrificing, or: This meal-offering, I am sacrificing. That is sufficient, and the High Priest does not participate in a lottery.
כיצד נוטל חלק בראש אומר חטאת זו אני אוכל אשם זה אני אוכל ונוטל חלה משתי חלות ארבע או חמש ממעשה לחם הפנים רבי אומר לעולם חמש שנאמר (ויקרא כד, ט) והיתה לאהרן ולבניו מחצה לאהרן ומחצה לבניו
How does the High Priest take any portion that he chooses first? The High Priest says: This sin-offering, I am eating, or: This guilt-offering, I am eating. And he may even take one loaf of the two loaves offered on the festival of Shavuot. He may take four or five of the twelve shewbread loaves that are distributed to the priests every Shabbat. Rabbi Yehuda HaNasi says: The High Priest always takes five of the twelve shewbread loaves, as it is stated: “It shall be for Aaron and his sons and they shall eat it in a sacred place” (Leviticus 24:9). From the fact that Aaron and his sons are listed separately, it is derived that half of the loaves were given to Aaron, or the High Priests who succeeded him, and half were given to his sons. Since, as explained below, only ten of the loaves were actually distributed, the High Priest received five.
הא גופה קשיא אמרת נוטל חלה אחת משתי חלות מני רבי היא דאמר פלגא שקיל אימא מציעתא ארבע או חמש ממעשה לחם הפנים אתאן לרבנן דאמרי לא שקיל פלגא אימא סיפא רבי אומר לעולם חמש רישא וסיפא רבי ומציעתא רבנן
This baraita is itself difficult, as it is self-contradictory. First you said: He takes one loaf of the two loaves offered on the festival of Shavuot. Whose opinion is this? It is the opinion of Rabbi Yehuda HaNasi, who said that the High Priest takes half. Say the middle clause of the baraita as follows: The High Priest takes four or five of the twelve shewbread loaves; we have come to the opinion of the Rabbis, who say that the High Priest does not take half but takes less than half. Say the last clause of the baraita as follows: Rabbi Yehuda HaNasi says that the High Priest always takes five. The Gemara asks: Is that to say that the first clause and the last clause of the baraita are in accordance with the opinion of Rabbi Yehuda HaNasi, and the middle clause is in accordance with the opinion of the Rabbis? That conclusion is difficult.
אמר אביי רישא ומציעתא רבנן ומודו רבנן בפרוסה דלאו אורח ארעא למיתבה לכ"ג
Abaye said: The first clause and the middle clause of the baraita are in accordance with the opinion of the Rabbis, and in the case of the two loaves, the Rabbis concede with regard to a piece of a loaf that it is inappropriate to give it to the High Priest. According to the Rabbis, the High Priest should actually receive less than one loaf, as in their opinion he is entitled to less than half; however, since it is inappropriate to give him a piece of the loaf, he takes an entire loaf as his portion.