I have in my Great Vault an Incorporeal Essence gorger at 694 Hero 1/6 which can go to 710, I have one equipped at 691 Champion at 4/8 which can go to max 704 YET AMR shows the new one at 710 is a DOWNGRADE of ).72%??? Yes I have the boxes all check marked for max upgrade AND upgrade equipped gear etc, so this is an internal issue the development team need to know about, it has been wrong on many of the trinkets I do believe
Could you post a snapshot of where this is happening? Press the “help” link next to the big Upgrade Finder section header on the website, and copy the generated 32-digit code here. With that I can try your exact case and see what’s up with the ranking.