Rukoo and Qaumah

Q: I read in a book that to read Sami Allahu liman hamidah, to read hamidah with a soft h i.e. a ه will break salaah. Why is that? The meaning is changed? What if it happened unintentionally?

Q: Is it sunnat to join your own ankles in ruku and sajdah?

Q: In Kitaab al-Asl of Imaam Muhammad it states that according to Abu Hanifa the imaam should not say "Rabbanaa lakal hamd". But in the same book Imaam Muhammad ask Abu Hanifa whether the Imaam should recite basmalah, amin and Allaahumma rabbanaa lakal hamd silenty and Abu Hanifa says yes. Why this contradiction?

Q: Must one make sajda-e-sahw if one misses the ruku in the last raka'ah in witr?

Q: I would just like to get clarity on a few aspects of Salaah (hanafi).

1. What is the correct way of performing ruku, does one say Allahu akbar first and then bend down, or does one say Allahu akbar in the motion of bending?
2. In witr Salaah, does one drop their hands and then raise it for dua Qunoot, or can one raise their hands directly from the folded position?
3. After salaah, I know it's sunnah to say Astaghfirullah thrice, is it also sunnah to say Allahu akbar once then astaghfirullah thrice?
4. Is salaah valid if in a 4 rakaats fard salaah, after surah Fatiha of the 3rd rakaah, you say just 'bis' of Tasmiyah before realising you don't read a surah now? If it is valid, what is the maximum length of Tasmiyah which may have been recited mistakenly without invalidating Salaah?

Q: I would like to know, is it necessary to do sajda-e-sahw if we pray "Subhanarabiyal azim "only once in ruku instead of three times, also if we mistakenly pray "subhanarabiyalala" only once instead of three times in sajda?

Q: I have a question with regards to method of performing salaah. If one is performing salaah, whether alone or in jamaah, should the person recite his tasbeehat in a manner that the next person can audibly hear what he is reading or should the brother read it softly so that the next brother cannot hear what the brother is reading. 

Q: What it is to read hamdan kaseeran tayiban mubarakan fee after ruku. Is it sunnat?

Q: Must a Hanafi fold his hands after ruku when he prays behind a imaam who does longer zikr than ''Rabbana lakal hamd'' such as;

رَبَّنا وَلَكَ الحَمْدُ حَمْداً كَثيراً طَيِّباً مُبارَكاً فيه

Rabbana wa laka l-h'amd, h'amdan kathiran tayyiban mubaarakan fih

Q: Should a Hanafi Imam pause before going into ruku after his qiraat as the hadith mentions? If No, then what is the answer to the hadith?