The reason for the last two errors is that the author did not read al-Haythamī’s complete comment when citing the ḥadith. Al-Haythamī presents it in the following form:
“From ʿAbd Allāh ibn ʿUmar who said: The Messenger of Allah ﷺ declared, ‘The best of you are those whose shoulders are softest in prayer, and there is no step … .’” He then adds:
“It was related by al-Ṭabarānī in al-Awsat exactly as quoted here, and by al-Bazzār except for the words, ‘and there is no step …’ to the end. The isnād of al-Bazzār is sound, whereas in al-Ṭabarānī’s chain there is Layth ibn Ḥammād, whom al-Dāraquṭnī considered weak.”
Al-Mun­dhirī says the same in al-Targhīb and attributes al-Bazzār’s version to Ibn Ḥibbān in his Ṣaḥīḥ.

These statements make it explicit that the second half of the report—the part cited by the compiler—was not narrated by al-Bazzār and that its chain is weak. Ponder this well.

Even so, I have found two corroborating chains that raise the narration to the level of ḥasan, as I explained in al-Ṣaḥīḥah 2533; for that reason I included it in Ṣaḥīḥ al-Targhīb wa’l-Tarhīb 501 and 504.

Next, he quoted the ḥadith of Jābir ibn Samurah as, “Will you not form rows as the angels form rows … .” In all printed editions of the book the two verbs appear with a ḍamma on the initial tāʾ—i.e., in the passive voice—and I know of no basis for that. In Ṣaḥīḥ Muslim, al-Muntaqā, and other sources the tāʾ is vocalized with a fatḥa, i.e., the active voice. Al-Shawkānī, however, recorded both readings, saying in Nayl al-Aʾwṭār 4/164: “With the initial tāʾ opened and the ṣād given a ḍamma (active), and with the first letter given a ḍamma (passive); what is meant is the row in prayer.”