There's also these two properties which you might find useful. See the SChartTitleStyle documentation for more :)
_chart.theme.chartTitleStyle.position = SChartTitlePositionCenter;
_chart.theme.chartTitleStyle.overlapChartTitle = NO; // adjust to preference
That does help me. I knew I was missing something right in front of my nose.
Not that it's important now that I can fix it, but I still don't understand why the example code defaults to not overlapping and any project I have started defaults to overlapping.