Why is the Holy Eucharist at times given in the hand rather then on the tongue as it is suppose to be? I have read that receiving it in the hand has never been approved by the Diocese of Rome. Another thing is that only Priests are allowed to distribute communion but I have see more and more men and women being allowed to distribute it. I don’t feel comfortable receiving the Bread of Live from someone who is not an ordained Priest.

The Church allows the communicant to choose between reception on the hand or the tongue. Neither is more respectful or reverent than the other when done in the proper spirit and with the proper disposition. For sanitary reasons, it is preferable to receive on the hand as the chance of transferring germs from one to another is reduced because there is no chance of contact between the communicant's saliva and the minister's fingers.

The ordinary ministers of communion are ordained bishops, priests and deacons. Bishops can authorize lay men and women to be extraordinary ministers of communion. This is allowed because of the large number of communicants. These lay people must be properly trained and commissioned. In our diocese, the commissioning is for a two year period. Even the early church had table ministers who assisted with the distribution so it isn't a "new" practice, just one that has been revived after a period of quiescence. If you do not feel comfortable with reception from a fellow lay parishioner, feel free to approach the ordained minister in a non disruptive manner. It is important to understand the Church's teaching on the presence of Christ in the Mass. In the  General Instruction of the Roman Missal, which guides priests and other liturgical ministers in celebrating the Mass, the first presence of Christ mentioned is that of his presence in the assembled people of God (GIRM #27). Christ is present when the assembly is gathered in his name. A second way in which Christ is with us in the liturgy is in the person of the minister. Christ is present to us in the priest, who is called the presider, or priest celebrant of the liturgical assembly. The presider leads the community in prayer and helps us to understand the words and actions of the liturgy. When he does so, he also acts in the person of Christ, on our behalf.

A third form of Christ’s four-fold presence to us in any liturgy we celebrate is in the Word of God. No matter whether we participate in a Mass, the other sacraments, or the Liturgy of the Hours, we always hear the Word of God proclaimed in Scripture. Whether that reading is from the Old or New Testament, Christ is present in that Word. In fact, at the beginning of John’s Gospel, we hear that Christ IS the Word of God. He is God speaking to us. And so each time we hear God’s Word, from the law, a prophet, a psalm, a gospel, a letter, or any other Scripture passage, Christ is there for us and with us.

The fourth way Christ is present to us in the liturgy is in what the Church calls the "eucharistic species." This is the pre-eminent presence of Christ. Christ is especially present in the bread and wine that become the Body and Blood of Christ. What looks like bread and wine has truly become Christ’s Body and Blood by the "taking, blessing, breaking and sharing" of the presider and the assembly gathered and by the grace of God. Was it not in the "breaking of the bread" that the disciples at Emmaus recognized Jesus present with them?

Therefore, when we receive these sacred elements, we become even more the Body of Christ. "We become," as St. Augustine reminded the Church in the 4th-5th centuries, "what we eat and drink." In other words, we become Christ present, and the cycle begins again—Christ present in the gathered assembly, in the presider, in the Word of God proclaimed, and in the Eucharist broken and share.(See also the Constitution on the Sacred Liturgy , CSL #7).

I hope this helps clarify the Church's understanding. It is good of you to keep inquiring. Our bishops have called for lifelong formation in faith and this is one part of that.