I am using Crate 0.57.8 I have created a little ranking tool which you can see by visiting http://207.180.237.183/ranking/ you'll see the result at position 3 has a higher new_score than the documents which were ranked 1 and 2. Please feel free to try different sql queries / search terms
Please upgrade to the latest stable version first (3.1.3). Looks like a bug but we only provide fixes for the latest stable version.