The flightstone/crest search will take the item in question, add it to your inventory, then try to find the best combination of gear that you own to maximize the value of that item. The score is the delta between your current Best in Bags solution and the best solution found that contains the new item.
If you have a case where you think a specific item is ranking too high or too low, follow the instructions in this post to create a snapshot ID and reply to this thread, we’ll take a closer look:
Is the version of the AMR add-on you’re using the most up to date one?
Is BM your primary spec.?
Do you have any customisation in place, that may skew how upgrades are seen?
Are there any other changes to gemming/enchants that you may have missed to make the Weapon change make sense?
To assist w/ the above & your case, in general, please can you create & provide a Snapshot ID for the Hunter in question? Thank you, in advance.
Looks like @yellowfive got to this at the same time as me…