Because these are two separate plugins, Powerpress player will always be added either above or below the post. The WP Audio player is added within the post depending on where you decide it to be (in the middle, at the top or at the bottom). This explains the behavior you are having.
I would suggest that if you want to use the WP audio player that you disable the player in Blubrry Powerpress.
For downloads, we are working on statistics option for Blubrry Powerpress users. Please keep an eye on our blog
http://blog.blubrry.com for an announcement.