Bots in range spawn more on left

While practicing some flicks in the range, 
I noticed that they spawned more often on the left than on the right, 
so I decided to test it. This is what I got for 5 rounds:

1 - 20 left, 5 right
2 - 22 left, 3 right
3 - 21 left, 4 right
4 - 18 left, 7 right
5 - 22 left, 3 right

This is not a coincidence anymore is it?