whitterz- the interview with your section manager will be so they can get to know you and so you can meet the figure of authority over you (in the case of mine that is quite litteral due to my sm's height) they will also confirm when you work and make sure you understand dress codes and stuff, as to what they will ask/do it will depend on what happened in the group interview, you may be given a tour of the branch, and you will likely be asked about your hobbys/achievements.
Breezey- when i wanted a day off i asked them about 2 weeks before but they like to be asked as soon as possible do they can arrange some one to cover so it will depend on your sm/ asm/ dm (who ever you have to ask, i had to go to my asm who then checked with the sm as there were two others on my section off at that time)