Blue dream

I've started my 1st grow in years, i got a bagseed in a bag of ice indica crystal extreme and its 3 weeks into flowering and no pests or hermy parts but it shows for the ice Gene's so kush skunk white widow and northern lights but also shows for blue dream and sour diesel why is this could that be the pollinators or something to produce the rogue seed and any tips never grew blue dream before, not grown for 19 years as my countrys a joke but wondering how long flowering should take for something that crazy mixed thankyou.