The order of the girls is something that also worries me. Before the update that changed how things work, they were ordered by world, and event girls ended up in between them. Now, the new ones get at the bottom, which is simpler, but I wouldn't say better.
This applies to everyone who joined before the change, so you're not alone with this "problem". I'll also have it when I get there, because I still have to get some girls to level 3 (I have 55 girls).