How did your Catholic Priest respond when you told him you didn't choose Jesus as your lord and savior until recently? Did you tell him of your conversion experience? What did he say?
What did your Catholic Priest say when you were Baptized again? Really, I kinda want his quote.
I would like to know how the Priest would respond if our friend told him he does not believe in the Catholic teaching on the Holy Eucharist anymore but still presents himself for the reception of it. Our friend is using subterfuge to attend both churches and being a Christian is all about truth, is it not?
Even if you go back to the Donatists, the Roman Catholics were particularly angry when the Donatists rebaptized their members.
Baptism can only be done once. When my wife came into the Catholic faith tradition there was no need to repeat the procedure - she had been validly baptized already. As regards our friend, of course the priest would not look on his actions favorably.