Umm here is your problem entirely. Fact. They are issues of the same person you are with now, she is not a different entity and as long as she lives her past will not be something you can separate. YOU DO need to come to terms with the past of hers or you need to let her go. To be honest it's not fair to her if indeed she has changed as much as she has and that's not impossible, many people grow, learn and change from pasts they are less than proud of. If you dwell on her past and try to pretend it's a different person you're dealing with you're only going to have that blow up in your face someday when something forces you to accept that she is the same person in a different phase of her life, hopefully a better one but still, the same person. You're deceiving yourself in order to not deal with the reality that she has a past that you refuse to accept.

Either accept the person you are with entirely, whole heartedly and without prejudice or move on to find that unblemished woman you expect to find (good luck with that tho since not a single one of us is free of some guilt in our pasts)