Maggie cut and dyed her hair after coming back from Africa. Only several months later she has again long blond hair. Six months is more than enough time for someone to grow out their hair.
Charlie tells Shep that the Navy is building four 25,000 square foot rooms full of servers holding "yottabytes of data". In 2012, using terabyte hard drives, one yottabyte of storage would have required a million city block size data centers, or roughly the acreage of Delaware and Rhode Island combined.