You need to set the threads as stickied and then they should automatically separate :3 And for infractions do that by clicking "Give user infraction" on the post that needs infracting; infractions are given on the forum itself, not via admin/mod cp c:
In the bar on the left-hand side there should be a whole list of options you can click. There's one called "Notices" (usually above "Announcements"), and if you click that it'll come up with options saying "Notices Manager" and "Add New Notice". All you do is click "Add New Notice" then select the options you want and write the text before clicking "Save" at the bottom. c: