Piano notes in animation nodes not effect with Successive notes

I have piano visualizer with animation nodes in blender … notes in works fine but my problem is successive notes is not work correct … when two notes is successive the second note is not rotate

as you can see the notes in midi player is two notes but in blender just rotate 1 time

my AN nodes is here :
https://blenderartists.org/uploads/default/original/4X/b/a/6/ba68f15ee7e06de9af70db11948394075adc98ac.png

9ESYe