4k Movie Collections Appearing as HD

[Coherence]

So, I've been clicking on some of the 4k movie through this website. The Pierce Brosnan Collection says "HD" when you click the link. When open it up in iTunes through the link, it lists all the individual movies as HD. However, when you click each individual movie, it lists them as 4K. The same thing happens with other 4k movie collections such as "Sony Pictures 4K HDR Drama Collection". While I assume iTunes upgrades you to 4K when you actually play them, I'm afraid they will register these purchases as HD so when they go through MoviesAnywhere, it will say you own the HD version. (Obviously not a problem currently with the James Bond films but I expect them to be MoviesAnywhere) someday. So what the heck is the problem with iTunes showing these as being HD on the web and in their app unless you clicks the individual movies?