The fact that they made queen cells tells me there was no queen, OR, they had replaced their OLD queen with a new one, and thats the one YOU took, so the OLD queen is still in there.. I have on numerous occasions found the old momma queen laying in the same hive as her daughter.
So, you can HOPE you were mistaken, and that the three day old egg molted into a larvae, and it was 5 days old instead of two or three.