picked up a new customer a few weeks ago that has a Panasonic dbs 72. the original installer set them up with did's off pots lines. ex.. line 1&2 goes to ext 100, 3&4 goes to ext 101 and so on.
they also have it that the bosses lines ring on the secretary's phones. not the extension but the co lines.
the trouble is that after we put in new extensions they are now telling me that some calls are going to the secretary's voicemail and some to the boss's.
I know that there is no individual transfer timers. and I have gone through all programming to see what I may have missed. but I cant find what the original installer did to get it working.
just a note, I did change it so that the extension rings on the secretaries phone and took out the co ringing but that seemed to have confused them even more so they had me put it back.

If you have call forwarding enabled on a station for which a trunk rings only on that station, then the call will follow the station's call forwarding. This might have something to do with your situation.

both sets are call forward to v.mail, that's where the trouble is coming in.
the voicemail is playing tag and is randomly choosing mailboxes

If it's a fairly recent vintage system, you should be able to accomplish what you want by using "BLF ringing". As noted, all CO calls that ring at a phone will try to follow that phones forwarding. BLF buttons that ring (actually they beep) do NOT forward. There are lots of fun things to do with BLF ringing. I've setup quasi-virtual-phantom extentions by hanging a POS digital phone next to the switch and then assigning BLF buttons for it all over the place. They can ring,no ring,delay ring in both day and night modes.