Background:
I am a Canadian citizen. My husband is a Spanish citizen. We were married in August 2008. We applied for my EEA Family Permit November 2008, starting with the Entry Clearance.
I've been in the UK since November 2008. I entered the UK with an Entry Clearance stamp for EEA Family Members, valid for 6 months to give time to apply for the EEA Family Residency Permit. I applied for the Residency almost immediately. At the time, the UKBA said they would take 6 months to return our passports with my stamp. It took over a year. When I received my passport back, I received the EEA Family Residency permit stamp inside, date issued January 2010. Expires January 2015.
Here are my questions:
1. Did my five years start November 2008, when I legally entered as a spouse to my EEA National husband? or does the five year count start from the date of the Residency Stamp on January 2010?
2. After my five years in the UK, do I have the right to apply for British Citizenship? Or is there a step in between...like some kind of Leave to Remain or Permanent Residency without an Expiry date?

3. If my husband works abroad, but the company is UK based and he gets paid from the company within the UK to our UK bank account and pays UK taxes, does that count as eligible UK employment?
Thank you so much in advance for answering my queries. I appreciate this forum so much. It's really helped us since we've migrated to the UK and with our entire application process for the EEA Residency.