So the Advanced Research Science Vessel Retrofit is a Rear Admiral version of a Commander Level Ship. The Advanced Heavy Cruiser Retrofit is a RA version of a Cmdr Ship. All the other retrofit ships available at Vice admiral are retrofits of Captain or Rear admiral Ships.
Why is it then that the retrofit of the Heavy Escort (a Commander level ship) is a Vice admiral ship rather than a Rear admiral ship? I am a vice admiral, so I don't much care, but it seems odd to me.