Post Voting Plugin Functionality

I purchased the Post Voting Plugin because I needed a solution similar to how Reddit behaves. I messed around with it a bit and have a few questions…

1. When people vote on posts in Reddit, items with more posts rise to the top and others go to the bottom. Is there a way to make this plugin function the same way?

2. I want to be able to change my vote, like Reddit. Is there a way to do that?

Thanks,

Jeff