Qasar Salaah and Full Salaah

Q: If musaafir performs two rakaats and someone tells him we should pray four. Due to confusion he reads four again. Which one is counted?

Q: I went to Durban for 17 days. I read qasar salaah for the first 7 days. When I realized my mistake, I read full salaah for the next 10 days. How do I correct the salaah of the 7 days?

Q: I stay in Durban but my parents stay in Newcastle. Every school holiday I go to visit them for about 2 weeks. Will I be considered a musafir when I am in Newcastle?

Q: I've travelled from Mumbai to Jaipur (distance 1150 km) on 30th Aug 2019 on an official visit and my stay will be till 14th Sep (total of 15-16 days). Insha-Allah on 2nd Sep I'll be going to Ajmer for 1 day on a personal visit (distance 135 km) and shall come back on the same day to the same hotel. After coming back I'll stay upto 14th Sep for offical work.

After arrival in Jaipur, should I offer qasar namaaz as per hanafi school of belief?

Q: I travel 100 km in the morning and come in the evening. I pray zuhar and asar there... Should I pray qasar?

Q: I am working in Delhi, India for the last ten years and residing here only. Now, on a few occasions, 2 or 3 times a year, I visit my hometown which is more than 700 kms away. I go there for 12 days. Should I offer qasr namaz or full namaz?

Q: If a person sets out on a journey to a certain place. There are two different routes that he can take to reach his destination. The first route is less than 78km while the second route is more than 78km. Will such a person be considered a musaafir if he takes any of the two routes when travelling to his destination?

Q: I am from Roshnee, studying in Azaadville (distance between Roshnee and Azaadville is 76 Km). My wife is from Rustenburg which is +/-100 km to Azaadville.

So we staying together here in Azaadville, but I do not intend ever settling down here because I have to basically just finish my studies.

Ps. We usually don't stay here for more than 15 days. So can the following intentions be permissible: 

My niyyah: My darul watan is still Roshnee, I make niyyah for safr when I leave Roshnee intending to continue my journey more than safr distance, and stay in Azaadville for less than 15 days (by our flat).

My wife's niyyah: She keeps Rustenburg as her darul watan as she hasn't established herself anywhere else yet, not Roshnee nor Azaadville. Azaadville is just a darus safr as she will not stay for more than 15 days like myself. She reads qasr when in Roshnee.

So do I read qasr in Rustenburg? Are these intentions correct or should we change our niyyah to base ourselves in Azaadville and work accordingly or what is Mufti Saheb's opinion?

Q: I decided to travel to Dammam for 17 days. In between I went to some other town for 3 days which is approximately 200kms from Dammam.

My question is, after I came back to Dammam, do I need to pray qasar or full namaz? Initially it was more than 15 days stay so I was praying full namaz but after moving out of town and coming back and less than 15 days of stay left, so will it be qasr or not?

Q:

1. A musaafir read four rakaats salaah unknowningly and after a couple of days he corrected it to two rakaats. Will his salaah be valid?

2. A musaafir read two rakaats but someone told him to read 4 rakaats and due to confusion, he reads four rakaats. Does the first salaah count and will the second salaah which was read as four rakats be regarded as nafl?