First I'd Ditch the ecollar or at least find a trainer to help you use it.
If you use it to stim the dog off a bite you better be dang sure she knows the reason she's getting stimmed is because of the bite. If she thinks the stim came because of the other dog then of course she would growl if one got near you or her. Not saying this is why she behaves like this but using the ecollar like this isn't helping the situation.
That's a good thing to keep in mind, but I don't think she has any connection between other dogs and the ecollar. I don't usually have her in the ecollar (very rarely, actually), and use it only to correct bad behaviours that she is very familiar with.