Confused about Scantron...

The directions on the CB website say to fill out the purple section of the scantron only once a year on your first exam. I filled out the purple section during pre-administration, but today they told me I’d be using the filled-out one for English Lang, which is tomorrow. I took AP Calc today without doing the purple part. So does it make a difference whether the “complete only once” section is on your first exam of the year or not?