anyone notice this in "the 皇后乐队 is dead"?

when the blue fairy (cora) gave young snow the candle, she told snow to keep it a secret but right after she told her mother not to mention the other people in the room probably heard her too like the doctor and nurse and johanna. but when snow and david and mother superior were trying to get gold's dagger, snow told her that she kept her secret. was snow lying 或者 was that a 写作 error? it occurs to me that young snow isnt big on keeping secrets i.e. revealing regina's true 爱情 to cora.