I think that is what we call a contradiction.
Not a contradiction at all. Unfortunately somewhere along the line of history Christendom has become confused on salvation.
Today when you hear about eternal salvation you hear about people "soul winning" and what not. However eternal salvation does not have anything to do with your soul per se, but rather your spirit.
When Adam and Eve died they died spiritually. I was there spirits that were cut off from communion with God, because God is essence is Spirit and we must worship Him in "spirit" and truth. They were dead spiritually and we today are dead spiritually.
When we believe on the Lord Jesus our spirits are made alive and passed from death unto life. This is a one-time act that never has to be repeated, because the spirit can never return to a dead state.
Once our spirit is alive we are then capable of understanding God's deeper message which is the salvation of the soul.
The soul and the spirit are not the same thing, although there are a number in Christendom that would have us believe they are.
The salvation of the soul is also referred to as sanctification. It has to do with discipleship.
Scripture talks about salvation in the past, present and future tenses. We have been saved (spirit), we should be in the process of being saved (soul) and we will be saved in the future (realization of the salvation of the soul is in the future) and our bodies will be saved in the future.
One of the biggest reasons we know abou the difference between spiritual salvation and soulical salvation, if you will, is because of the warnings in Scripture.
Christendom normally handles these warnings in one of two ways, which both are incorrect according to Scripture. One group says the warnings are not for believers, while the other group says the warning are for believers and that's why eternal salvaiton is conditional.
However Scripture says eternal salvation is not conditional, but these warnings are for believers, so what is conditional? The salvation of the soul. It is conditioned on our believing (unto the end) and producing the works that we were created for.
Not only is it not a contradiction, but it is the only view that brings everything in Scripture into complete harmony.