Salaah

Mistake in Attahiyyaat and Durood-e-Ebrahim

Q:

1. If one happens to omits portion of Durood Ibraaheem due to one forgetting it or making a mistake, is the Salaah valid?

2. If one happens to recite Tashahud and one repeats the portion( Ash Hadu...) where the index finger should be raised, perhaps due to getting stuck, should one raised the finger twice?

3. If yes, and it was not raised twice, is the Salaah valid?

4. Whilst in Salaah, during Durood Ibraaheem, one adds the words "Sayyidina" before the words and Names Muhammed (Sallallahu Alaihi Wassallam) and Ibraaheem (Alayhis Salaam), is the Salaah valid?

Istikhara for marriage

Q: I did istakara for my son. The girl he wants to marry my heart feel ok but the other day I dont know if I was dreaming or just laying down to sleep but it all of a sudden came to my head that it is delaying because she hasn't told her parents.

Masbooq (latecomer) joining the Imaam before Salaam

Q: Whilst performing Salaah with Jamaat behind an Imaam, if a Masbooq (latecomer) joins the Salaah after the Imaam has completed four rakaats and joins just before the Salaam.

1. Is it necessary for him to recite the tashahhud with the Imaam for his Salaah to be valid or is it sufficient for his Salaah to be valid that he joins in the Salaah before the Imaam makes salaam?

2. Should the Masbooq recite only Tashahud in the Qa'dah or also Durood Ibraaheem and Duaa after Durood.