Qasar Salaah and Full Salaah

Q: I though I was in Qasar and performd some salaah (Not with Jamaat) 2 Rakats of asr, 3 of magrib , 2 of isha. Later I came to know that I am not in qasar. Is my prayer valid?

Q: I travelled to the city from a village which is 220 km away. I will stay here for two months. I thought I was in Qasar and offered Salaah with Jamaat in the musjid. Are my Salaahs valid?

Q: A musaafir became a muqeem in Durban because he intended to stay for 30 days. However, after 20 days, he travels to Port Shepstone, for one day only, returning the same day to Durban. Will this person read qasar for the remaining 10 days or the full salaah?

Q:

1. If someone intends traveling to a place more than 55 miles (i.e. 88 km) from his hometown but intends staying at his destination for more than 15 days, will he do qasr while traveling to that place?

2. If a person intends going to a place more than 55 miles (i.e. 88 km) from his hometown. After reaching he intends to stay for 15 days. Later on he changes his mind and intends to stay for 2 days. Will he be musafir or muqeem?

Q: Most of the time I am out of my home town more than 100kms. When I am back home for 10 days, in this 10 days I must make my namaz qasar or the normal namaaz?

Q: When traveling for 2 nights and you pray as a musafir then you realise that your staying longer than 16 days. Do you have repeat the namaaz you missed during the first two days?

Q: A person travels to a place that is safar distance and intends staying there for 10 days. After 8 days the person changes his intention and intends staying for another 8 days. Will the person read full namaaz or will he be a musaafir? What about the salaah that was performed in the first 8 days? Will he have to repeat the Salaah?

Q: If while traveling, I performed a Salaah without shortening it, is the Salaah valid? Am I in any way sinful? For example, I performed four rakaats for Isha instead of two rakaats, while traveling.

Q: If one want to travel to a city 150 kilometers away from the city I am living and I want to stay 20 days in that city. Do I have to make qasr during travel (i.e. when I leave my city until I reach the city where I am travelling to) but once I have entered the city I must pray again full?

Q: I live in Morocco but i own a holiday flat in Portugal which stays empty most of the year, when I go there am i musaafir?