Sunan-e-Muakkadah

Q: Kindly advise with regards to the following:

1. I woke up for fajr and there was only enough time to read my fardh. Can I read my sunnats after sunrise?
2. When I am a‎​ musaafir is it better for me to read my sunnats or not?
3. The two sunnatul muakadah after maghrib, is it part of awabeen or is awabeen 6 seperate rakaats?

Q: After the Esha Salaah, when the musallees had already performed their witr salaah, the Imaam made an announcement that the salaah had to be repeated as he did not have wudhu.

1. Should the 2 sunnah and witr salaah also be repeated again?

2. If nafl salaah was performed, should that also be repeated?