That seat looks funny at that angle. You can flush it out more if you cut down the seat post clamp area. You can cut it down to 1 bolt or cut both clamp bolts off and make sure you secure it another way.
I had a seat post that was just a little too large for the clamp area so I cut off the clamp bolt section and pounded the post into the tube. It was stuck there forever. Just leave enough sticking up that you can clamp your seat to the post still. Should help flush that seat and not make it jacked up in the back.