Cholzhauer,
We need to figure out where the call is coming from, and I am sure it is not through a Hunt Group, but that will be difficult to do unless one of them asks how the caller got to them when they answer it. It may be that a particular number is going directly to an extension list, with those members, without going through a Hunt Group. You can look for this if you find a Ring-In destination with a P### or a PP###; like PP052.
Thanks,
TE