I don't know that I could rephrase better, but then I'm tired, so maybe it's just me. It all just seemed too loopy and convenient for me, but I think that expecting logic out of it may well be asking too much.

I suppose I've lived too long with the very common time travel rule of not interfering with your past self, because the very act of doing so will alter the future in ways you can't forsee, but in this story it is okay to interact in some ways but impossible to interact in others, and, again, that all seems a bit too convenient. If you are able to go back in time to tell someone that someone is going to die, by the same laws you should be able to go back in time to prevent death, or be able to tell your Past self how to prevent that death. It should be all or nothing, I guess is what I'm trying to say. Either you can interact with the past or future, or you can't.

This is just too blurry for me. If you are going to do a science fiction love story, DO a science fiction love story. Don't half ass it.