Moving into a new home

Q: I am moving into my new house which has just been renovated. I called a Shaikh for dua and food and I have also fed my immediate family members and neighbours on that day. Is this bid'at? I am a bit worried. I have been correcting my intention doing it to please Allah and not to please makhlooq. What should I do immediately after entering the home? Me and my wife were thinking of performing two rakaat of Salaah and making dua, then reciting Qur'an and making ta'leem of fazail. Can you please advise.

Making jamaat

Q: Is it permissible for a mother and son to perform Salaah together in Jamaat? If so, where should the mother stand and is it necessary for the mother to give the iqaamah?

Adab and respect

Q: I want to ask regarding the adab of not calling a person's elders using the word 'you' , but rather repeating their title e.g. moulana

1) What are the origins of this and which kitaabs is this mentioned in?

2) In Arabic when addressing Nabi (Sallallahu Alaihi Wasallam) in madinah munawwarah, the word ka / you is used. Also when making dua to Allah Ta'ala both in English and Arabic, does this not then become much more disrespectful than using the same word you for some elder?

Dreams

Q: A person had a dream that their whole family was in Madinah Shareef and certain things took place. They informed a Maulana of this dream and the Maulana replied that the person will soon go to Madinah Shareef. I am aware that our aqeedah is that only Allah knows matters of the unseen and of future events. Therefore are we to believe that the Maulana is just giving an indication of what the dream could lead to based on what has been told to him, but the Maulana cannot say that it will certainly happen 100% without a doubt?