You wrote:
“Then if it is a sacrifice and the wine is in reality Christ’s blood and the bread in reality his flesh then he is being sacrificed over and over again by definition of that idea of transubstantiation is a sacrifice, whereas the Scriptures say Christ was sacrificed once for all time. (Heb. 9:23-28)”
No. There is only ONE sacrifice. Jesus is not sacrificed over and over again. The ONE sacrifice is re-presented again and again instead.
“If it is a sacrifice, then it is transubstantiation. St. Augustine makes it pretty clear it is a sacrifice.”
Either it is or isn't, either it's repeated over and again or it isn't.
According to Paul's words the only presentation of Christ's sacrifice was made in heaven and Jesus commanded it be ‘remembered’ (Luke 22:19) not “re-presented”.