If, for example, I get Shepard to activate Cryo Ammo (which has the +50% effectiveness for squad mates) then it replaces any ammo setting they my squad mates have active. If I then switch on one of their powers (which has the same squad bonus) then it overrides Shepard's ammo setting. The two ammo types become mutually exclusive.
This is a problem because it means only the person with the last ammo type activated has it at full effectiveness, and I can't diversify.
Except for the obvious of respec'ing and avoiding the squad bonuses (so each member has to manage their own ammo types, which is what I'll do if I really have to) is there any way to avoid overriding a squad mate's ammo setting when activating one on another member that has a squad bonus?