The dir command detects column width incorrectly

When I run the `dir` command, it can't seem to figure out the width of the terminal. Specifically it seems to be receiving a width that is one less than the visual width of the terminal. The result is that one character of the first file on a new line is left at the end of the previous line.

PS. Yes I know `ls` is usually used on linux, but it's slower to type on dvorak.