Sway, I'm very happy to hear that you've upgraded the tanks, and I'm sure your fish are happy about it too!! However, as has been mentioned, African dwarf frogs don't come in albino so yours are definitely African clawed frogs and either need to be returned or housed in a separate tank all to themselves.
Personally, I think that 10 gallons per frog is the better estimate because there is a fully grown one at my LFS in a 10 gallon and by the looks of it adding another frog would make that tank quite cramped... he is absolutely enormous!