I just discovered this behavior using dfSummary() when both the summarytools package and printr package are loaded in an Rmarkdown document.

Here is a reproducible example:

The following Rmarkdown document will produce what you expect using dfSummary():

When rendered produces:

However, if you add the printr package, then the rendered output includes both the Graph and text.graph. I finally figured it out through trial and error. I am posting this issue as a suggestion to add a note somewhere to warn the user when using dfSummary() to make sure they are not also loading the printr package when rendering Rmarkdown output.

When rendered produces:

I could not find any easy way to "turn off" the text.graph column.