I think it's nothing wrong with that (given that the 4th options appeared). if I'm not mistaken there are some events intersecting with the ones from the Akiha route, so just go forward and see what's gonna happen. oh, and you also have to clear at least one route of Near Side of The Moon. (Arc's or Ciel's, whatever you may prefer. I cleared both before going for the Far Side though)
it would be more convenient if you turn the 'skip read parts' on. if you reach the ending with all the parts being skipped, only then we can really say that there may be a problem (or you picked wrong choices, not really likely if you do what Ciel-Sensei said
in such situation I'd go consult the flowchart rather than walkthrough, but I guess that's a matter of preference.