I was just rewatching ep. 2, and noticed something during the end credits, but it’s a spoiler. Behind the tag it goes.
I think this is far more likely to be the animÃ©’s direction than my earlier explanation, which just wouldn’t fit in 13 episodes, as Steven points out. It also neatly puts the more epic (speculated) storyline in a possible second season, in addition to delaying it to let Ikeda catch up.