Highcharts y-axis Ceiling not being respected

Question

I have a problem with Highcharts where the Ceiling of one of my two y-axes is not being respected.

Y-axis \"1\" represents percentage values, so has a Floor of 0 and

Answer 1

From Highcharts API:

When using multiple axis, the ticks of two or more opposite axes will automatically be aligned by adding ticks to the axis or axes with the least ticks. This can be prevented by setting alignTicks to false. If the grid lines look messy, it's a good idea to hide them for the secondary axis by setting gridLineWidth to 0. Defaults to true.

I have updated your fiddle with these corrections.

chart: {
        alignTicks: false
    },
...
yAxis: [{
            ...
            gridLineWidth: 0,
            ...

http://jsfiddle.net/2bzew/3/