GS Disable Weapon Failing Sometimes.

hello everyone, opening this thread with hope that anyone can lend me a hand with this, lemme explain.

Lately when doing omen with rdm/nin for cards, i //gs disable main and sub so my weapons dont reset @ casting but when i press F9-12 to change casting mode or anything for the style (using motes GS), the disable gets cancelled and i equip a staff that i dont want to, anyone knows why this happens? or any solution/way to lock weapons that isnt with //gs disable?

Thanks!