Using geom_debug() one sees that without groups or facets a data frame with two rows is returned. The example in the User Guide shows this. For some reason two versions of the same methods are run. The problem is not visible in the plot as two identical and overlapping tables are added to the plot with the top one hiding the lower one-
Using geom_debug() one sees that without groups or facets a data frame with two rows is returned. The example in the User Guide shows this. For some reason two versions of the same methods are run. The problem is not visible in the plot as two identical and overlapping tables are added to the plot with the top one hiding the lower one-