As discussed there: http://discussion.oxyplot.org/topic/1041311-colum-items-not-rendered-properly-when-using-a-logarithmic-y-axis/#

In the oxyplot sample, there are two demos making use of Bars and Columns: BarSeriesDemo and ColumnSeriesDemo.
For the first, using a logarithmic axis in place of the linear one as Y axis does not cause any problem, the values are displayed correctly:

However, when doing the same with the demo ColumnSeriesDemo, the bars are not drawn correctly it seems, looks like they are "reversed":
In the class ColumnSeriesDemo.MainWindow, I changed the lines 43 and 44 from
tmp.Axes.Add(new CategoryAxis { ItemsSource = this.Items, LabelField = "Label" });
tmp.Axes.Add(new LinearAxis { Position = AxisPosition.Left, MinimumPadding = 0, AbsoluteMinimum = 0 });
To

tmp.Axes.Add(new CategoryAxis { Position = AxisPosition.Bottom, ItemsSource = this.Items, LabelField = "Label" });
tmp.Axes.Add(new LogarithmicAxis { Position = AxisPosition.Left, Minimum = 1, Base = 10 });

With code behind:

With xaml, without the log Y axis:

Why doesn't it behave the same way?