I'm a bit confused myself here, too. I can't see anyone other than Kesgrave selling them as blue phantoms. Some liberties are taken with naming conventions I reckon. However, perhaps they're stressed in transit and will colour up given time to settle.
Blue Pearls are supposed to be related directly to Snowballs and should be Neocaradina zhangjiajiensis, but these phantoms are advertised as N. heterpoda, which is odd.
Time will tell if yours colour well, Mama, but I must say, I'm not all that convinced you'll get THAT blue colour in the ad.