Currently, the hand/glove and offhand/glove slots are both described as simply "Glove" in the "Equipable in the X trinket slot" text. This makes some sense, since they're both gloves, but it causes problems with items that can only be equipped in one of the two slots.

Spectrum enables only the hand/glove slot, and adds glove items which each represent a pair of gloves and thus are mutually exclusive. However, if another mod is present that enables offhand/glove, then Spectrum's gloves say "Equippable in the Glove slot" but can actually only go in one of the two slots. This can't be resolved by making the Spectrum gloves go in both slots, since they're balanced around mutual exclusivity.

To fix this issue, I'd suggest changing the names of one (or both) of the glove slots so that you can tell at a glance whether a given trinket is equippable in both of them or only in one.

Gloves being named the same is the intended behavior, spectum's functionality is against how trinkets typically works. It'd potentially be reasonable to have the gloves remove the other glove slot? But this is how trinkets is supposed to be working.