This kind of stuff is why some people want you to watch the sub instead. This Dub, while being very good, simply change the dialogue too much. It also doesn't explain the time travel mechanism as clearly as the sub, which is also you were having some trouble understanding how certain event went through earlier in the show.
2018-08-09 23:52:27 +0000 UTC
About the scene where Kurisu was talking to someone else, it was a translation error in the Dub. In the sub, she actually says "why do I have to help Hashida...", which indicate she was talking directly to Daru on the phone.
