Even if Cygnet 14 was an official repair stop, it sounds like they had just gotten the job or assigned it to a culturally inexperienced crew. They made a beginner's mistake with that voice, which according to Spock would take several WEEKS to fix at a starbase. I see no problems with Cygnet 14 being, say, a relatively new Federation member who later contributed to the solution for the ro-bo-tic-voice.