My distances aren't high. It is 2.314. Your distances are much higher. I have used K13 and it just depends on the Vahaduo you use.
Target: Grace
Distance: 2.3148% / 2.31479278
54.3 Germanic
45.0 Insular_Celtic
0.7 Roman
I've done it again and get Roman this time instead of Balkanic. The first one I used was this one. It just puts the first figure in a percentage and the second figure as decimal. Your figures are 12.471 compared to mine which is 2.314.
https://vahaduo.github.io/vahaduo/