Cobblepot93

I lend two pokemon to another user for only 1 minute so they can evolve (clamperl-->huntail and seadra-->kingdra). The other user trade me the huntail back, but cannot take the seadra/kingdra off the PC. Now i have to wait till he has all 8 badges we think. But why is the lended Seadra didn´t come back on its own?