Qadha and Kaffara

Making qadha due to eating sehri after fajr time sets in

Q: On the first day of Ramadhaan I did not know about the 18 degrees fajr time so I ate suhoor after fajr entered according to 18 degrees fajr time. After the first day I found out about the 18 degrees fajr time and how its more accurate than 15 degrees so I started following that after the first day. Regarding that first day, since I did not know about the 18 degrees fajr time, do I have to make it up? And do I have to make it up immediately after Ramadhaan or any time up until the next Ramadhaan?

Recommencing the kaffara due to breaking one's fast before sunset

Q: Someone is doing kafaarah for ramadan fast. She is on her fifteenth fast. However when she was on her fifth fast she had broken her fast two minutes before iftaari but she carried on doing her kafaarah. What is the conclusion? Will her kafaraah start again from after that day or does she completely have to start all over again?

Qadha for missed fasts

Q: When can a woman can keep her missed fasts which were left due to menses during the month of Ramadaan? Is it obligatory to keep all missed fasts of Ramadaan in the same year and can not be kept after one or two years?