When I use the plugin, when I first start to make a table the default setup has 4 Columns, a header 2 rows and a footer.
However the 4 columns are marked as Row 1 Row 2 etc. If I click to add another cloumn it comes up as column 5.
Similar if you delete the column marked row 4 and then replace it with another column, it will be correctly labelled column 4.
So you just need to change the labels in the default setup.