Rewriting Memory, Rewriting Self

This is my first blog. I am finding myself going back and editing previous posts. And adding new material. This seems appropriate given the exploratory dimension of the blog--it seems write to add questions, observations to old material. And it seems appropriate to the theme of learning to be--I'm in the process of learning to blog, learning to be this blogger.

But, I wonder if that's what others do too. So my impression of the blogs as an archive of things said in the fixed past is wrong? These are not publications, like newspaper articles, but ongoing growing things?

Question: A question about memory, then. Will I remember in the future that this record I am leaving behind is one that I went back to and rewrote? There isn't any edit trail, as at WikiPedia. What will that do to my memory of who I am or more accurately, who I will turn out to have been?