Sajda-e-Sahw

Q:

1. I usually take the least number of rakaats when I totaly get confused in the number of rakaats of salaah and complete my salaah. I don't sit for tashahud in every rakaat in this case but I do sajda e sahw in the end after reciting tashahud by saying salaam to the right side and then two prostration of forgetfulness and again tashahud then durood and dua and then salaam to right and left. Is this the right way?

2. If not, what is the ruling on my previous salaah?

3. If it is wrong what is the right procedure?

Q:

1. Reciting faatihah after tashahhud in second rakaat of a four rakaat salaah. Do I need to do sajda-e-sahw?

2. Reciting tashahhud after faatihah needs sajda-e-sahw?

Q: Is it right to perform sajda-e-sahw if someone forgets to make it within salaah? When I remember, without reciting anything else, I just to sit down and recite attahiyyaat upto (abduhu warasuluh) then one salam on the right side then two sajdahs of sahw and then attahiyyaat, durood and dua and then 2 salaam. 

Q: How should sajdah-e-sahw be performed?

Q:

1. Before starting witr, I made an intention in my mind that I will recite the surahs which are sunnah to recite in witr. Then I said softly that I make niyyah to pray 3 rakat witr, but I did not say anything about which surah I will recite. During the prayer, I forgot to recite the sunnah surahs in the first two rakahs. Then I thought that I will do sajdah sahw, but I forgot to do that too. Is my witr valid?

2. Is sajdah sahw waajib if someone intends to recite a specific surah and then forgets to recite it?

Q:

1. In a 4 rakaat fard salaat, sometimes I say bismillah mistakenly in the 3rd rakah after reciting surah al-fatihah. Will this be considered as if I recited a surah in the 3rd rakah?

2. If I recite a surah in the 3rd rakah and forgot to recite in the 4th rakah, or vice versa, do I need to perform sajdah sahw?

Q: What do I do in the case where I make a mistake during salah?

Today I made a mistake after saying samiallah hulimanhamidah, I went down to do ruku again. I suddenly stopped prayer because I realised this mistake, then redid the salah. I was on the first rakah. Is this when one does sajdah sahw? If so, how do I perform it?

Q: I mistakenly stood up after the last sajdah of the last rakaat of salaah. How should I proceed with the salaah to make it valid?

Q: If while praying two rakaats salaah, after sujood of the two rakaats, one forgets he has completed one or two rakaats and therefore stands up with the intention of praying one more rakaat and doing sajda sahaw but on standing he remembers accuratley that he in fact has completed two rakaats.

1. In this situation, while he has stood up with or has already started reciting Surah Fatiha, is it permissible to go to tashahhud or one should complete four rakaats?

2. Would sajdah sahaw be needed after completing four rakkats?

3. Or salah will not be valid and one must repeat it, if for example he was praying two rakaat sunnat muakkadah of Fajr or two rakaats Fardh of Fajr because he has prayed four rakkats instead of two?

Q: I was reciting Surah Faatihah in place of Attahiyyaat. I realized at the time when I was going to lift my index finger. I stopped Surah Faatihah then recited Attahiyyaat and ending with sajdah sahw or I completed Surah Faatihah and ending with Salaam only. Will my salaah be valid? If not, kindly inform me as how do I correct such an error in salaah?