Jamaat Salaah and Imaamat

Q: I have a situation where in my work place in Saudi Arabia (far from any musjid in construction site), the person that often is imaam of the small musallah we perform zohr and asr salah, makes masah over his normal cotton socks when he makes wudu. 

I read salah for few months behind him and only found out about this recently. 

He confirmed that some scholars in Saudi passed a fatwa that its permissible. It would seem that many of the general public here follow this fatwa. 

I do not want to argue and create fitnah based on the situation. I know the fatwa is that wudu is not valid if masah is made over normal cotton socks based on majority opinion. 

However, based on my situation/ the fact that I did not know or could not control the imaam, is my previous salah valid or should I repeat it? 

Also, going forward, what should I do: Can I read salah behind him, based on the fact that I cannot control the imaam - perhaps consider him a different madhhab/ different opinion with salah being valid Insha Allah or is salah invalid for sure in which case. Should I read salah behind him and repeat it or should I try to avoid and read on my own. This will result in me not being able to make salah in jamaat at work and possibly create division. (Also reading salah and repeating is a challenge especially asr based on limited time and people observing you).

Q: If a person misses a rakaah of his Salaah with jamaat and he is a masbooq then what is the correct method of standing up? 

I have noticed that everyone stands up after the first salaam. Is this correct or is it better to stand up after both the salaams?

Q: If I am performing salaah as a Hanafi behind a Shaafi and he makes an error by forgetting the first tashahud in Asr Salaah, what is the right way of making sajdah sahw or should the salaah be repeated?

Q: I have problem. Last year I had a panic attack while performing salah. From that day I am unable to pray salah in a masjid. Whenever I went for salah in the masjid, my situation becomes very worse. A lot of times I had to cut my salah and come home and then I performed salah at home. 

My question is, can I perform my salah at home till my situation becomes good.

Q: If there are only two people reading namaaz together, should they stand next to one another or should the person following stand at the foot of the imaam?

Q: There is a man who brings his small son to the masjid. The na baaligh son wears shorts and his knees are exposed. Is this permissible?

Q: Will men get the same reward as performing salaah in the Haram if they perform salaah in the hotel jamat khana following the imam through the speaker?

Q: Can and imaam put on a short sleeve jubba to perform salaat in jama'ah?

Q: If a husband and wife read salaah together, where does the wife and daughter stand compared to the son?

Q: Can small children (non baaligh) stand at the end of the adult staff where an adult cannot stand due to musalla being small?