Salaah

Q: when I came late for salaah and had to complete missed rakaats I read durood-e-ibrahim and dua. Does this make sajdah sawhu waajib? If yes and previously I should do this out of ignorance and cannot not remember how many times are done it what should I do?

Q: If one has a habit of forgetting multiple things in a Salaah such as number of rakat, number of sajda, first tashahud and so forth, how that person would perform his salah?

Q: As a general rule does an act which would be makruh if done intentionally, if that act happens out of control of the person praying, does this make his salaah makruh ?

Q: The mosque I am going the imaam makes the witr as 2 rakaat followed by 1 rakaat in which he makes qunut after the ruku whereby everbody raise hands as in duaa and says everytime amin to the duaa.

If a Hanafi follows this imaam is his witr also valid? Secondly they start the tarawih rightaway after the fard of isha thus they dont perform first 2 rakaat sunnah. When should I pray this?