You should not have 100-107 set up in F65, B12. From what you wrote above, "If I dial 108 to 115 from any extension it does answer, and it answers with the correct greeting if it was an outside CO being directed to VM, and responds to prompts as programmed by the CCR menu.", your voice-mail extensions are 108-115.
Remove 100-107 from F65, B12. Put 108-115 in F65, B12. Then dial 440 and see what happens.
