I am building a fighter-style character for an upcoming game, and I have been thinking of dipping into the Kensai ACF from DragMag 310. One of its features say that I get +1 to hit and damage at level 1, level 5, and every 5 levels again after that. Usually this kind of ability will explicitly say "class level", but this one does not. Does the ability continue to scale after I multiclass out of fighter?