Ramadhaan & Fasting

Wudhu and fasting for a person who has a problem with bleeding gums

Q: I have a problem of bleeding gums. The bleeding occurs anytime during the day or night. Sometimes I am unaware of it and other times I spit and rinse my mouth when I get taste in my mouth. My questions are 

1. How do I maintain wudu in this state? This is causing me to perform wudu multiple times sometimes. 

2. How do I fast? I try my best to rinse my mouth continuously when I am awake to avoid swallowing. But I am worried about when I am asleep and don't know if I swallowed or not. 

3. If my fasts are becoming invalid what is the kaffarah I need to pay? Should I pay for all the previous Ramadans because I am not sure about when I started suffering from the bleeding gums problem.

Keep qadha fast of Ramadaan during the first nine days of Zul Hijjah

Q: I missed 10 fasts during Ramadan due to illness. I am recovered now and wish to complete my missed fasts. I planned to keep the 10 during the first days of Zil Hijjah not expecting any additional reward but just as a sense of fasting is more prevalent around me. 

Please advise if this is ok as our local imam in a talk says Fardh and Sunnah cannot be combined! Should I rather wait and fast after or continue in these days? If I do fast, my intention is of my qadha and will I be in sin for keeping these qadha in the auspicious days of Sunnah fasting?