I see from the top drop down picking a tier it allows tier 6 unlimited. But the lower drop down does not show a tier 6 or the copy for a tier 6.

Does tier 6 exist? Or is this a technical issue now providing the copy for tier 6 but it allows me to add a tier 6 into my cart. Weird I saw Tier 6 below unlimited 2 year plan on the copy not showing on computer or phone but top drop down allows me to select to my cart. Don't want to pay until I am sure what the deal off.