1) Does it matter if you are back up or not? If you get offered the role, means you are the best candidate
2) When hiring the candidate, is not about the "best", but the "best" subject to availability (is the candidate keen on the company, is the candidate too expensive, does the candidate have long notice period, etc)
Yes it is normal. Usually they will call you to ask you if you are keen, then give you a verbal offer, if you accept, then they will slowly do up the contract.
But sometimes it takes slow because contracts need to be signed off by senior management (if the managers on holiday then they cannot give you the physical contract)
Yes. Normal