Shabbos Bulletin Parshas Korach 5778
When there is an aufrauf AND a bar-mitzvah in a Shul on the same Shabbos, the minhag developed to give the bar-mitzvah boy maftir, with the chosson getting the Aliyah before maftir.
But the truth is that this minhag developed at a time when a bar-mitzvah was celebrated the Shabbos BEFORE the bar-mitzvah–and thus maftir was the only aliyah that the bar-mitzvah boy COULD get!
Shabbos Bulletin Parshas Korach 5777
There are different opinions about skipping the morning birkos hashachar (to be said later, of course), in order to say more pesukei d’zimra.
Of course, one should NOT be coming to Shul at a point in time that this choice and shayloh are relevant.
Shabbos Bulletin Parshas Korach 5776
If the chazzan omitted something essential from his private, silent shemoneh esrei, he may rely on his repetition of shemoneh esrei to fulfill his obligation.