Yes they ask the same questions all over again. My wife who is from HK is on the 5 year route to obtaining her permanent residence visa.
My advise is to keep a copy of the application form for your first application as you can refer to it again when making the next application. Also as part of the application process they need proof that you have lived together at the same address. So they ask for 6 official letters addressed to each of you spread over the 2.5 years or alternatively 6 letters addressed to both of you at your home address. For example bank statements, gas bills etc. So remember to keep useful letters!
Then there is the 'life in the UK' test and B1 English test and all kinds of other hoops you will have to jump through.
We are on the the final stage of this tedious procedure. A lot of it unnecessary in my opinion. Probably at the end it will have cost us around 5000 GBP in various fees.