Blogspot sites block pagination between sections (ex. Older Posts) with robots.txt. To capture this functionality you will need to:
Add an Ignore Robots.txt rule to each Blogspot seed
- or -
Add an Ignore Robots.txt rule to your seed host. Please note that this is different than adding a rule for blogspot.com. Your host could be something like example.blogspot.com, which will need to be added in its entirety for the rule to work.