“Jesus divided the bread, poured the wine and partook of both before it was presented to the disciples. I do not doubt that Christ performed this transubstantiation.”
Check your chronology. It is not your friend:
1) He gives thanks, breaks the bread, declares it is His body: “And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.(1Co 11:24)
2) After “he had supped,” He offers the cup, which He calls His blood: “After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.” (1Co 11:25)
3) After calling it the blood of the covenant, with the cup still in hand, He calls it “this fruit of the vine” which He would not drink AGAIN until reunited with the Apostles in heaven, either indicating He was about to drink it, or had just drank it: “for this is my blood of the covenant, which is poured out for many for the forgiveness of sins. I tell you I will not drink again of this fruit of the vine until that day when I drink it new with you in my Father’s kingdom.”
(Mat 26:28-29)
RC's have the same problem with understanding the clear words of Scripture with the passage that states that Joseph did not have sex with Mary until after Jesus was born.MO