Keeping the back stright in ruku'

Q: Sometimes in rukoo' I do the thikr and then I straighten myself a bit and hear a crack, so does that mean my back only became straight when it cracked? If so do I do the thikr again? Must the back in sujood rukoo sitting and standing always be straight or at ease straight? Is the neck or head considered in this?

Toes touching the ground in sajdah

Q: Majority of the time when I do sujood, my little toe doesn't touch the ground and perhaps the two besides it, but the big toe and one next to it  mostly do if not all do, so, is all toes touching the ground with pressure waajib/Fard, if so should one make movements in sujood or seating to ensure they touch the ground? Also I am not able to remember all the times this has happened, a lot though.

Hadith question

Q: There was a story between a jewish scholar and the Prophet (Sallallahu Alayhi Wasallam). The scholar asked him what is the best place on earth, he replied I do not know but I will ask to Jibriel (Alayhis Salaam) and after asking to jibriel (Alayhis Salaam) he responded he does not know either. He asked Allah and he was very close to Him. Between him and Allah there were 70,000 veils. Would you please let me know the correct story in Arabic with haraqat please?

Halaala

Q: Theres a couple that has been divorced about 6 months ago. Husband gave wife 3 talaaqs at once in anger. He also gave her prior to that 2 talaaqs. Moulanas of this town have told her that once 3 is given marriage is over completely. My question is if she gets married to someone else and divorces that person just to get back to the 1st husband is it valid? (To my knowledge I know its not allowed because you have to really be in that marriage and only once that husband really has problems then only can he divorce her). Is this correct? Also is there any  other way besides this of the husband and wife getting back to each other?

Marital problems

Q: I have a marriage problem. My husband don't want to sleep with me. We always have a big fight in the house. I checked with people and they say that our marriage has witchcraft. This is my second marriage and our marriage was going well till recently. Even with my job as soon as I got the job it finished by itself in a couple of months.