We Copts have a bad habit of calling everyone who serves as reader or chanter a "deacon". When Fortunatus says deacons go first, he is generally speaking of readers and chanters.
If there is a true Deacon or Arch-Deacon, he can distribute the Precious Blood only, not the Holy Body. Howeber, to be honest, we have very few Deacons in the US. I would say 99.9% of our parishes in the US do not have a true Deacon or Arch-Deacon. I think it is because according to our tradition, a Deacon, like a priest, must be dedicated 100% to the Church, not have a secular job, and wear the traditional cassock and such. So because of the shortage of priests here in the US, we tend to ordain capable and nominated men directly to the priesthood. We figure (I guess) they might as well be able to perform most of the Church's Mysteries as opposed to assisting the priest.
Regarding you second question, I would say that for the majority of Copts, frequent (weekly) communion is the norm. Of course, one must be prepared through confession but no as the Russians (some) practice (i.e. mandatory weekly confession). The general rule one often hears among the Copts is that monthly confession is somewhat standard.