Ramadhaan & Fasting

Forgetfully eating while fasting

Q: I have started qadha fasting of my previous fasts which I did not make up in time. Today accidentally in morning I forgot that I am fasting and talking to my friend she offered me sweet and savoury and I tasted some of both. I did not even remember after sometime that I was fasting when during conversation I told her I am fasting nowadays and realised that I was fasting and have eaten by mistake. I know in Ramadan you can continue the fast but I don't know if it applies to qaza roza as well. Please tell me if my fast is valid or do I have to do anything else?

Water entering the ears and using deodorant while fasting

Q:

1. While fasting, if a person takes a bath then, will the water entering the ears break the fast?

2. During wudhu, while doing the masah of ears, when we put our finger in the ear, will the water entering our ear break the fast?

3. After bathing will the use of deodarant (both spray and roll on) break the fast? Because it is said that the pores of the skin are open after bathing and the deodrant enters the pores thats how the smell comes when we sweat. 

Following the moon sighting of one's area

Q: Every year there come witnesses from people that they have seen the moon but the hilal committee dont take witnesses and says we can fast only if they will see moon. So as the system of moon sighting is not correct and also some people in society fast with nearby country. I live in Pakistan and people fast with Saudi Arabia. So can I fast with nearby country that is Saudi or any other country?