Unfortunately, this is a common situation in many RCIA programs nationwide.In my old parish the DRE and the director of RCIA wanted everyone to go as a group to one of the group reconciliation Masses prior to Baptism. In fact it was a scheduled part of the program.
My own personal take on the issue is this. In a progressive Parish, many people do not believe that original sin exists anymore and they no longer believe that Baptism removes it.
They see that entire concept as being somewhat archaic and even mystical. As true followers of the 19th century enlightenment movement that denied the veracity of miracles, they have extended that concept to baptism. They have developed the belief that baptism is merely an acceptance into the community. Baptism for them does not remove the stain of original sin, and certainly does not remove other sins that you are carrying around. In effect they have desacramentalized the sacraments. There is nothing mystical or miraculous in any of them as far as they are concerned. They are just rituals geared towards fostering a sense of community.
Further, since they believe that the community is all important, above even the worship of God, the sacraments in general and the Mass itself, they firmly believe that those in RCIA should and must do everything together to foster that goal of community,
Several of us fought this battle yearly for a long time. Since we did have the catechism on our side, we usually won. But it was always a struggle and at times, we lost.
Or more aptly everyone lost.