Conditions & Fundamentals of Hajj and Umrah

Putting on ihraam in Jeddah if going there to meet relatives and staying there for a few days

Q: I intend performing Umrah for my deceased parents. I’m travelling to Jeddah and staying for 2 days with my niece who resides there. After I finish Umrah I will go back to Jeddah for a week and then to Doha for 2 days. 

When and where do I don Ihraam? 

Can I perform 1 umrah for both my parents?

Haaji pelting on the 12th morning before zawaal

Q: This year while performing hajj, the Saudi Government directed the pilgrims to start performing the 12th dhul hijja rami after Fajr due to excessive heat and overcrowding to avoid any untoward situation. So, we performed the rami before zawal on 12th dhul hijja. 

Is my hajj acceptable or do I need to perform anything to compensate for performing rami before zawal? Are there any rulings or views of scholars on performing rami before zawal?