Salaah

Q: When it's khatam of the Quran in Ramadan taraaweeh, I understand that we end with alif laam meem in the last rakat. My question is that does it have to be till muflihoon or can it be till the end of the ruku?

Q: It comes in a Hadith that straighten the rows, the word "taraas" has been mentioned which means join like a brick wall with no gaps. So why do we not join the feet and only the shoulders. Also, what does it mean by close the gaps shaitaan will come in-between? Also, if the companions joint their feet an shoulders should we not follow them in the beggining of Salaah? And is it nessasary to join the shoulders? Please give me daleel as these are people's questions. Where I give dars.

Q: .Will a person have to make sajda e Sahw if he waits for more than the amount of three Subhanallahs after reciting surah faatihah in the third or fourth rak'at of fardh namaaz?

Q: If I make a mistake while leading salaah and the salah needs to be repeated, should the iqamat be given again?