I am an extraordinary minister of holy Communion at my parish. Last Sunday, a gentleman in the Communion line held up of those round tin things to preserve the Blessed Sacrament. I placed the host inside, and then gave him another host to consume. I am a new Catholic and this was one of those heat-of-the-moment decisions. Was I wrong?
It sounds like the gentleman in question was presenting you with a pyx, a container in which to carry the Blessed Sacrament to the homebound. Those who carry the Blessed Sacrament to the homebound should themselves be extraordinary ministers of holy Communion, so it is strange that you had no forewarning that an EMHC was to be given the Eucharist in a pyx.
I recommend talking to the coordinator of the EMHCs and finding out who this gentleman was so that you will know to expect him in the future. You might also recommend to the coordinator that the EMHCs to the homebound be introduced to the rest of the EMHCs so that you and your fellow extraordinary ministers will know that they are authorized to receive the Blessed Sacrament to take to the homebound. As it is now, anyone could present a pyx to be filled and take away the Eucharist for who-knows-what purpose.