I created a Hunt Group. (772)I put four extensions into the hunt group. Ext, 10, 29, 36 and 37. I have a selector code (7) pointed at the Hunt group (772). When all the above extensions are busy with callers, the fifth caller to the Hunt Group gets ext 10 voice mail box message. I installed a VM Cover button, which works fine, except when the fifth caller calls into the group. I installed Do Not Disturb buttons at all four extensions. The DND buttons are not depressed, thus accepting calls. Any ideas why the fifth caller is going to Extension 10's voice mail box, and getting a message that was created for the night caller to get? How can I get around this?