Are "Premium Unlimited" and "Unlimited Premium" two different mobile plans?

I just upgraded one of the lines to "Unlimited Premium" from "Unlimited," and the confirmation email says

•     50 GB/mo of high-speed data, reduced speeds after 50 GB
      15 GB/mo of mobile hotspot data, reduced speeds after 15 GB
      HD streaming with 720p video

This is different from the Premium Unlimited plan advertised:

• Unlimited talk, text, and data in the US and internationally
  Unlimited mobile hotspot data, reduced after 30 GB
  4K video streaming
  Upgrade your phone anytime, even before it’s paid off
  Spam call protection

Am I getting a grandfathered plan? I changed the plan for "unlimited international data," but the line still has Global Travel Pass ($10/day) that can't be removed.