Maybe I'm missing something of your explaination, but I dont' think that the second is "boosted", I just think that each stat has a maximum cap per item.
(I'm pretty sure that there isn't any cap for the player regarding a secondary stat, for example you can do a full Crit gear)
in that case it seems that for rings any secondary stat can't go over 24.

"Unfortunately" the The Diadem gear (that can give you more than 2 secondary stat per item) won't give you any secondary stat in Seal Rock,
you can see it equipping any the diadem gearpiece and see your stat drop down.