Upgrading with crests - trinkets

Hey this is my first season playing with this upgrade system, which I like but can be a little confusing.

We are near end of season and I have full 619 gear aside from a 636 weapon and one 626 trinket. My other trinket is mad queen’s mandate but only 606. Even with the low ilvl it has been a huge help for things like zekvir and other solo stuff.

I have one other 619 trinket. If I use crests to upgrade that to 626 also, does that “unlock” both slots to be able to go to 626 with valor stones if say I got a hero track mad queen or other trinket I want to use?

I tried this macro below but it only lists one “trinket” and says 619. I just want to make sure I don’t waste probably my last 30 gilded crests I will have for the season.

Macro: /run local n=tInvert(Enum.ItemRedundancySlot),a;for i=0,16 do a = C_ItemUpgrade.GetHighWatermarkForSlot(i); if a < 639 then print(a, n[i]) end end