This is not a pit question at all...it's an aggressive dog question. Any dog can be nasty based on how it is raised. One of my brother has two blue pits that are the best dogs in the world and my other brother has a lab/pit mix...any of the 3 dogs I'd have as my own if I wasn't newly allergic and had time for a dog, which we learned last year we do not.
Anyways, this is a serious issue and I feel bad for you guys. I'd be calling the cops EVERY TIME. I'd also call animal control. Is there no leash law in Florica? This is a legit safety concern and something is wrong with the neighbor for NOT having a more secure fence.
We have two neighbors who have pits, and one knows his dog is not the sweet, loving dog that I know them to be. He has a privacy fence and only walks him early in the morning or late at night, never when kids or a lot of people are out. The other has sweet pts, and has them trained well.
Like the other mom's have suggested, I'd find a way to carry a gun, if you're comfortable. It would be a sad thing for the dog to pass, but it's better than you or your daughter being hurt. Also, the wasp spray was a neat idea - I think that was Casey C's advice.
ETA: I just saw where you said animal control isn't really helping. I think you have no other option than to tell them man you will take whatever means necessary to protect your family.