To Discontinue the Intention of Fasting

Q: I did not know that interruption in, discontinuation of, the intention of fasting invalidates fasting and requires making the fasting up but not the kaffarah. However, I am now aware of this ruling. Now I am sure that I was often intending eating while fasting either due to hanger or sickness but I then did not eat. Considering that I did not know this ruling, what is my duty now? And, does the ruling differ whether or not I was blamed for the lack of knowledge? If I am to pay kaffarah, then what is it?
A: The validity of your fasting is questionable and you should, by obligatory caution, complete your fasting [i.e. if you are observing the fasting now] and make it up later in qada.