I am an EMHC, and the rules are different for receiving and consuming.
Receiving is when you go to Mass, go through the line, and receive the Eucharist. Consuming is just that-consuming the extras.
At my parish, the EMHC’s assist the Deacon to consume extra Hosts and Blood after the Mass is over.
However, what this priest apparently offered was a double reception. Yes, you can receive twice in one day, but not like that. I’m not sure if he did anything that was in violation of Canon Law, but it was a bad idea to do it.
It is his responsibility to consume extra Hosts and Blood. His EMHC’s should have helped him. Telling people to come back for seconds is not the way to handle it.