I have 4 caramel in an axe and when I equip it, i can't see it in the card upgrade screen.
I thought this was strange so I equiped my mino axe and I was able to see the mino cards
But switching back to the caramel cards I still can't see them on the upgrade card screen.
The extra caramel cards in my inventory doesn't show p in the inventory of the upgrade screen either.