Catholic Church Authority Versus Their Change On The Elements Of The Lord's Supper

In its beginning, the Catholic Church taught Lord’s Supper communicants should partake of the bread and fruit of the vine. This came to be called “communion under both kinds.”That agrees with passages like I Corinthians 11:26,28 which reads “For as often as ye eat this bread, and drink this cup, ye do shew the Lord’s death till he come. … But let a man examine himself, and so let him eat of that bread, and drink of that cup.”Notice that Catholics admit this was their original practice:· Communion under both kinds was the prevailing usage in Apostolic Times. (Catholic Encyclopedia, IV, p.176)· Popes Leo and Gelasius emphatically condemned persons who abstained from the chalice. (Catholic Dictionary, p.202)But then there was an about face made at the Council of Constance, Session 14, on 6-15-1415: Condemnation of communion under both kinds ... no priest, under pain of excommunication, may communicate the people under the forms of both bread and wine (www.papalencyclicals.net/Councils/ecum16.htm)Now I’ve been told the Catholic Church has changed again, and currently allows the laity to drink the fruit of the vine.How can the Catholic Church be a religious authority on level with Scripture, when they make changes in their teaching and practice? A changing standard is no standard at all!