What? Paul was wrong then?
1 Timothy 2:5-7 For there is one God, and there is one mediator between God and men, the man Christ Jesus, who gave himself as a ransom for all, which is the testimony given at the proper time. For this I was appointed a preacher and an apostle ( I am telling the truth, I am not lying), a teacher of the Gentiles in faith and truth.
Jesus died for our sins and rose for our justification, but He did pass on the authority to forgive sins...and commanded us to pray for our enemies.
There's a difference between being A mediator, and THE mediator.
Have you ever tried reading that verse out loud, varying the inflection upon different words?
"For there is one God, and ONE MEDIATOR between God and men, the man Christ Jesus..." (implying Jesus implores for our sake, even the wounds on his body doing so, as the Sorrowful Mysteries in the Rosary say)
or
"For there is one God, and one mediator between God AND MEN, the man Christ Jesus..." (implying that Jesus died for the sins of ALL MANKIND and mediates on behalf of fallen man)
or
"For there is one God, and one mediator between God and men, THE MAN Christ Jesus..." (stressing the incarnation and death/resurrection, not denying His divinity)
Salvation is found in no-one other; but God can work by many methods to bring us *to* belief in Christ.