One of my Guildmates Completed all 5 Construction Schools and had scribed them before again speaking to the Imperial Recognition Officer NPC in Dalimond. She did not receive the Master Builder Emblem.
I suggested that she reacquire each of the 5 construction emblems and see if the NPC would award the Master Builder Emblem. She did cycle through the 5 construction craft trainers with intermediate stops at the IRO NPC and with the 5 emblems in her inventory she did receive the Master Builder Emblem.
Hopefully the Imperial Recognition Officer can be made to recognize scribed prerequisite emblems from the corresponding listing of these in Craft Abilities, rather than necessitating the reacquisition of those prerequisite emblems which had been scribed. (As currently configured the Grand Master Crafter Emblem which has 19 prerequisite emblems would be a potentially painful process had these emblems been scribed).
Knossos