No it doesn't stay at 3, it's only at 3 right now because that's how many Muds I've rescued. The Muds I rescue are being counted as casualties instead of rescues
I think I am going to go find a 4th and see if it corrects itself. If not, then I think I just have to reinstall and start over ;(
EDIT***
Oh and it also says 31 rescues, so basically it is counting my rescues as casualties AND rescues...but I'm still concerned it's going to affect the ending for me. Maybe if I play through it will correct itself on the next zone. I'm afraid to waste so much time doing that though, when it's just a theory.