Tosfiyos Megila 23a gives 3 reasons.
1- Since the Maftir of Shabbos has only 2 Pesukim and we do not read less than 3 Pesukim. We can not start from a earlier or finish with a later Pasuk as it has nothing to do with Shabbos.
2- The Haftora has to do with what we just finished reading, and if every Shabbos we read the same Maftir then all the Haftoras ...
Conceivably, another point might be the fact that maftir is more of a "public performance," so to speak, than the other aliyos. Nowadays most people who get an aliyah don't read their own portion, but the maftir nearly always does (except on the rare occasions where someone is called up for it and doesn't know how to read it properly).
Rabbi Ovadia Yosef (Yalkut Yosef Mo'adim pg. 101) rules that a Cohen may be called up for Maftir Yonah:
Kitzur Yalkut Yosef 622:9:
כהן שזכה בקניית עליית מפטיר של מנחת יום הכפורים, כי נכספה וגם כלתה
נפשו לקרוא בהפטרת יונה, יש לו על מה שיסמוך שיעלה לעליית מפטיר, אחר
שקראו כהן ולוי. ובלבד שיאמר השליח צבור, ואף על פי שהוא כהן יעמוד
A Cohen ...
He certainly can. All that needs to happen is to have everyone else in the room be of the same lineage as himself, or at most only one member of a different lineage (Shulchan Aruch OC 135:12). Alternatively, if all he is interested in doing is reading it and not neccesarily getting the Aliyah, he can serve as the Baal Keriya for the Haftarah if the minyan is ...
I don't really know why, but here are two possible ideas:
Acharon, Acharon Chaviv (The last is the most beloved) - Rashi Bereshit 33:2
To give the same Aliya to every bar mitzvah boy (or bridegroom). Since the bar mitzvah boy (or the bridegroom) may be a Kohen or a Levi, he couldn't get any other Aliyah besides the Kohen, Levi, or Maftir Aliyah. If the bar ...
Read the Beur Halacha commentary on the same page in your link. He explicitly states that even if you make a mistake as the one you listed, the Haftarah is still the Chanukah haftarah. The reason is because of Pirsumei Nisa (proclaiming the miracle of Chanukah.)
He states that even if you accidentally recited the Rosh Hodesh haftarah in error, it's fine.
Maftir is not considered one of the 7 "main" aliyot of the parsha. Technically, the entire parsha has been read and maftir is, usually, a repetition of the last few verses of the the weekly reading. When another Torah is used for maftir, it is a similar idea. The main parsha has been read, and maftor is an extra aliyah. Therefore, a Cohen may be called. This ...
The Shaare Efrayim does not address this anywhere, which leads me to believe there is no halacha about it. Nor do Taame Haminhagim or the recent books Ishe Yisrael (A. Y. Pfoifer (?), 5758) and Hak'ria Batora V'hilchoseha (Akiva Meler (?), 5769); Aroch Hashulchan and Mishna B'rura seem not to, either.
AFAIR, every time I've noticed which way it was done, ...
Perhaps this answers my own question:
I managed to locate a phone number and just called long distance to a descendent of the Huncovce Horowitz family and asked him about this. My erroneous assumption was that the Haftorah had to be sung with the Haftorah trope, which often needs to be practiced some beforehand. But he assured me there are still many ...
The connection to the tribal offerings to Chanukah is in the use of the term Chanukat Hamiuzbe'ach as seen in Bemidbar 7:11."Chanukah" means "dedication", and on the actual Chanukah, in a sense, the Bet Hamikdash was re-dedicated.
With some variations, the reading each day corresponds to the numerical day of dedication as outlined in Bemidbar 7:12-73.
It appears from the Aruch Hashulchan in the last line of סימן קמד - שלא לדלג בתורה מעניין לעניין, ודיני ההפטרה that in extenuating circumstances one could call up for Maftir a person who already had an Aliya.
. ובכלל אין לעשות כן שאחד יעלה שני פעמים אלא בשעת הדחק (שם). וכתבו דהמהרי''ל עלה ללוי וגם למפטיר, ואולי היה מוכרח לזה מאיזה טעם.
He doesn't ...
According to minhag Ashkenaz the next sefer Torah is placed on the bimah to the left of the previous before the hagbahah of the previous.
Source: Rabbi Binyamin Shlomo Hamburger in Guide to Minhag Ashkenaz.