My problem is basically in the title. I put a Healer's Hand IV materia in a Wand of Tides, and it shows my Healing Magic jump from 403 to 418, but my Cure III ranges from 850-900 whether I have the +Healing wand equipped or any other wand.

However, another Conj in my LS has +16 Healing Potency in his hat, bumping his Healing Magic up to 419, and his Cure III jumps up to about 910-950 with the hat on, rather than the 850-900 without it on. Our equipped traits were also the same, so am I right to assume that I have a bug on my hands?