Hello Hotspot. Kya Dark Lineage Wiki looks good but in order to be spotlighted you will need to fill out the mobile main page. Let me know when you've done that and I'll be happy to add it to the spotlights.
To answer your question, the guideline for spotlights is just two per year; but not necessarily calendar year. So if you have a spotlight now, you can have one more sometime over the next year, and then a third one would have to wait until at least December of next year. So yes, you can request two spotlights "back to back", but you probably don't really want to do that unless you plan to wait a whole year before requesting the next one.
Right now, there isn't that much activity on the wiki, so there isn't a need for more staff members. But if it gets more active, I will definitely consider you. I will go ahead and make a page on details about becoming staff, I'm also an admin on the Suikoden Wiki and I like to sometimes use what they do and apply it to here, I'm going to see what their details are.
In the mean time, look around the wiki if you haven't already! There are plenty of things that can be edited and added! There's plenty of fun and interesting stuff on the wiki! I also suggest checking out the Legends & Mysteries page! It has tons of cool facts and questions about the game, and if you have an idea, see if it fits and add it!