Are PM & M *REALLY* Playing Both Weekends of ACLMF?!?

I wanted to know whether Metallica plays the first weekend or the second weekend so I slid the filter to WK1. I saw this:

Then I slid the filter to WK2. I saw this:

There is something not working in the HTML, the CSS, or the JavaScript on this site: https://www.aclfestival.com/lineup/interactive-lineup/