Update: I just recieved my Biometric card today. Took them only 3 days! Very happy now
As to your questions..
1. none of them is a utility bill really... I guess its just to prove that I am really staying with my husband. Its not really required but I submitted some anyway cos its what others did. I just wanted to be in the safe side.
2. And sorry, yes, I did submit my english test certificate, although upon checking, if you've taken IELTS, it should appear in their system. But again, just to be on the safe side, bring it with you if you have it.
3. We paid 1001 pounds exactly, thats when you book your appointment online. And that's it.
4. No, we didnt submit my husband's proof of address, that's not required.
5. Some of those proff of addresses are in my married name and others are in my maiden. It doesnt matter as long as you have your marriage certificate and passport.
6. When you book online, you will get to choose a day and time when you're gonna go to the home office, its completely up to you really. I dont think many are applying cos when we booked there were loads of slots available.
Hope that helps. Best regards!