I am trying to position the header inside the div like so:

Not having much luck. What’s going on? How do position within the table row header?
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That div.headerContainer is not valid markup so the browser will try to correct it. Rather style the th ‘s and add classes for first and last. Here is an example. Another option would be to use an appropriately sized background image and apply it to the parent div (.geniusPicks)
HTH! 🙂