Mina

Is Mina part of Makkah?

Q: I have read a fatwa of Darul Uloom Deoband that Makkah and Mina are separate places till the day of judgement and also opinion of yours is same. So as there is another opinion which states now Mina is part of Makkah (only for prayer to be full or Qasar).

1. Does that mean that the fatwa which says stay in Makkah before Haj is calculated is intact and will not change?

2. I also came to know that these are differences in fiqhi masaail and it has been there since the Sahaaba, so one should follow anyone and shouldn't object to others.

3. Will a person be sinful if he follows anyone?

The Sunnah of spending the night in Mina

Q: 

1. Recently, the Saudi authorities have erected tents and made a camp in Muzdalifah due to the lack of space in Mina. On the 8th, since the tents in Mina are full, some haajis are made to stay in these tents which are in Muzdalifah.

Through spending the night in these tents, will the sunnah of spending the night in Mina be fulfilled? 

2. Secondly, the haajis returning from Arafat also spend the night in the same area where the tents have been erected at Muzdalifah. Will these haajis be considered as having fulfilled their wuqoof of Muzdalifah (as in reality it is actually proper Muzdalifah).