most likely scenario...

he had a full squad of 22 players

then he signed a bunch of players who are reserves

he then auctioned off his subs so that only 2 remain in the sub position

the reserves are still unsigned (some are signed since your squad has to have 14 players)

give it a few days and the players will be signed or released and he will be back to normal (or he could be raising funds and signing and selling free agents, so check the names to see if they change or stay the same)