Salaah

Q: If a person recites a surah in the first rakaat and repeats the same surah in the second rakaat of a fardh Salaah, will it be makrooh?

Q: If a person recites half of a surah in the first rakaat and recites the second half of the same surah in the second rakaat of a nafl Salaah, will it be makrooh for one to recite in this manner?

Q: If a person recites half of a surah in the first rakaat and recites the second half of the same surah in the second rakaat of a fardh Salaah, will the Salaah be valid?

Q: If the time for Fajr salaah in the masjid /musallah is up, and there is only the muazzin and imam present, but someone arrives just then but still needs to make wudhu and read sunnats. Should the muazzin stand behind the imam because they know there is another musallee that will join the salaah later, or should he stand on the right of the imam and when the musallee comes to join then move back to the saff?

Q: Are the duas in jalsa and qaumah Sunnah or mustahab?

Q: Should an imam read the extra duas in jalsa and qaumah when performing salaah in jamaat? Or are these not to be read while performing jamaat?

Q: Is it permissible to perform Salaah with a short-sleeve kurta?

Q: If asr Salaah is until maghrib and if esha Salaah is until fajr, then why is there a hadith that says asr is until the sun turns yellow or pale and esha is until midnight?

Q: I have one major problem during salaah and that is that I cannot pronounce in the tahiyyaat the last letter (n) of the word " as saliheen" especially during the first tashahhud. So I keep repeating it, until I manage to pronounce it. If I will recite it as "as salihee" without the last letter "n" would that be also valid and the meaning still correct? Or should I recite like "as salih" without "een" at the end, like the tanween we do not recite at end of ayaats?

Q: When leading the salaah, what should one do when his wudhu breaks? Must the salaah be broken, or is there a way for the congregation to continue?