Another brioche question

I have a pattern for a pullover shown in Nancy Marchand’s book, Knitting Brioche. The pattern is not in the book but the author very kindly emailed it to me. It is in Pearl Brioche in 3 colors. My problem: The sweater pattern says it is done over an UNEVEN number of stitches. In the Brioche book it shows it over an EVEN number. I am very confused and don’t know which one to use.
Can anyone help me?

Follow the pattern, not all brioche sts are done on an even number of sts.