. . . I goto time machine with the contact open in address book... and no matter how far i traverse back, the hospital number is the most recent one and doesn't change to the one i had on there a couple days prior.... as a matter of fact, the hospital number is STILL on the contact card even if i traverse back a month..
If the display is "frozen," showing the same thing in all backups as the "Now" page, it's a known problem on Snow Leopard. See #E5 in
http://web.me.com/pondini/Time_Machine/Troubleshooting.html