And again..
Free from Indwelling Sin
Romans
8 There is therefore now no condemnation to those who are in Christ Jesus,[a] who do not walk according to the flesh, but according to the Spirit. 2 For the law of the Spirit of life in Christ Jesus has made me free from the law of sin and death
What you need to recognize is that sin does still dwell in us. You are correct when you say we have freedom from it through Christ, but that does not mean it is absent. It means that it no longer has dominion over us. In other words, we don't have to obey it as our master any longer.