Gauntlet Jump

I think Gauntlet only boost "Battle/Fight", and not Jump. I think this is a glitch, bec equipping Gauntlet force the Jump/Dragoon character to wield only 1 weapon with no damage boost. If this is true, then does anyone manage to fix this before?

Another thing I noticed but could be wrong. What else does Gauntlet failed to boost? I think it fail with Sniper eff, Ogre Nix critical eff, and other wpn effs. Was these intentional?