When I use a backlink checker and see blogs that have excepted my comments are those blogs dot follow blogs since the backlink showed up in my backlinkes.
not always. Depends what backlink checker you are using. For instance you can use backlinkwatch and it will show a sample of backlinks and label whether they are do follow or no follow. It is natural and helpful to some extent to get the links, even if no follow so keep up the good work on the blog commenting.