Sajda-e-Sahw

Imaam making a mistake in qiraat and remaining silent for more than three subhanallahs

Q: The imaan was reading Surah Sajdah. He got stuck repeatedly and paused for more then 3 subhanAllahs. Does salaah need to be repeated because he didn't make sijdah sahw? 

He got stuck like this before. He seems to be ignorant of the masla. 

He also stands with his legs far apart like a ghair muqalid. What should be done in this situation? How should he be corrected?

Sitting for tashahhud in the first rakaat of Zuhr Salaah and making sajdah sahw

Q:

1. I was reading 4 rakaats fardh of Zuhr Salaah. After the first rakaat, I sat down and started reading tashahhud. I realised my error, but I completed the tashahhud, stood up and after the second rakaat did the tashahhud again and completed the rest of my salaah as normal. I did a sajdah sahw at the end, but I didn't recite the tasbeeh in the sajdahs. Is my salaah valid?

2. Previously, I was also reading 4 rakaat fardh of another salaah. In the second rakaat, after reading Surah Fatiha, I untied my hands to go in ruku. I quickly realised my mistake, tied my hands again and read a surah and continued the rest of the salaah as normal. Was I meant to read sajdah sahw in this situation?