no it does not deny anything, it simply states he died once for all....the sin has been forgiven, the eternal damnation has been paid for, however, the soul of the individual still is marred by the stain of sin, despite being forgiven..thus the need for cleansing and purification after death before one can be in the presence of the Lord.
Not true. We are in righteous standing before God.
Jesus NEVER mentions a place of further purification for sins.
Since Catholics hang so much on the direct words of Jesus, perhaps you could tell us where He refers to such an important part of the salvation process.