Haste, protect, etc... never get double cast so fear not, if your character has protect on the protect gambit will be skipped.

The only ones that cause trouble are :
- Steal, Poach, Drain, Syphon

They keep on being activated even though there is nothing else to steal or no MP or the foe is immune. And then your character never attacks or does anything else...

When this happens manualy get in to the gambit list and turn that particular gambit off