In my current setup (7bf2edcbb7a84a019a9a42f330bcb9c1), AMR is recommending a 554 ilvl amulet instead of an 606 one. Yes, the stats are much better haste/mastery instead of vers/crit but it still is a downgrade.
Dont know why/how but it seams to have fixed itself
First thing I noticed is that the Set Up for best in bags is not the same for all three specialisations; example: Blood has “Force Tier Set” checked but is priority 2 in the list. If you set all three to exactly the same filtering criteria it ‘may’ help.
Secondly; that list matters - Unholy at the top tells AMR that you play Unholy most, then Blood then Frost… if that’s not right you’ll need to drag them to the right positions.
As for why that Neck is being chosen - Haste, for Unholy…??
As per., I’ll cede to @yellowfive & @Swol for more expert opinion, but that’s all I have.
EDIT:
I did try Unlock All on Unholy, but it made zero difference.