Stringgrid Subgroup

I do have minor problems using subgroup in string grid.

I use the sample program asg38.dproj containing groups.
If I add column titles in the property ColumnHeaders as follows:

It works fine - the title "Car" has disappeared as expected

But if I add a subgroup, the columns are displaced, meaning that the column titles no longer fits the cell contents.
I couldn't find a sample program containing subgroups.

We'll investigate & report on this.