After I saw the first reply in my email, didn't have the time or inclination to respond especially as it's been that way for as long as I remember in the series.

But anyway, as a temporary measure (since I needed it for my training mission target ranges) until they either fix that script or get the nopop versions of the targets working I have created a temporary fix using a slightly modified version of the original script and the nopop targets. It can be found at www.rustyinplaces.org/armaediting/nopop_issue_fix.Stratis.7z

Could be done with a command to force the change similar to (this would also be useful if it could work with the default channels):
characters setradioChannel index
e.g.
[myCharacter1, myCharacter2] setradioChannel 3;

After testing this out it explains why during testing of certain things when I have shot people they have died as if they were shot in the head.

Definitely needs looking at and preferably changed to at minimum head shots are the only ones to cause head damage, would be better to have areas kept to same hit area with a faster bleed out for more wounds.