Hi and thanks. I've completed 4 of the easy missions in career mode but seem to be having a problem with the mission that involves using a decoupler (the something-something 18â€â€one of the first ones, if not actually THE first decoupler). I've went into orbit with the decoupler, went around Kerbin (or the whatever the home planet of the Kerbals is called) a few times, and used the decoupler to, well, decouple my engine after burning to a reentry trajectory. After landing successfully two of the parameters for the mission were completed but the mission remain incomplete because it says I have to use the decoupler. Well, I did. Is this a bug? I know that there are some missions that need to be completed using a plane rather than a rocket but this said nothing about flying. Any help appreciated. Thanks and safe flying!