Most of the times, this is caused by having a string value for the y-axis. The same values are recognized, but different values are just added as new y-value on top of existing values. So "1","3","1","1","1","1","1","2" in this case. Could you verify if your y values are integers?
Hi James,
I'm facing the same issue, if you found the solution then please share it here.
Hi James,
I found the solution.
when selecting other attribute than Number (integer, Long, etc.) you will face this issue.
So, Use Integer attribute for the y-axis can also be an AutoNumber, you will get the range from zero (0).
It worked for me, Hope your problem solved.