Yes, they are using Facebook and checking it regularly. I got a reply in maybe 2 hours on a Friday night of a long weekend. And personally, I found it less intimidating than calling them. I think it's a good tool and I'm glad they're using it.
I found a Katherine Walker in Ancestry.com, born 04-Apr-1936 in Henry County KY.
I also found a Kathy W. (with an alternate name Kathy Walker) in Veromi.net, born 04-Apr-1947. She is from Hearne TX.
But no Katie Walkers with an April 4 birthdate.
I wonder if she could be the Katherine Walker born in 1936. She may call herself Katie because that long term memory in still intact - her firm memories maybe that of childhood. While I am no expert I think this lady is older than 70.
I couldn't find any Walker family in Knox Butte in the 1940 census, however I found some in the Lane County area with relatives all around the Willamette Valley.
How was she able to transfer buses?
And how could someone do something like this?
http://www.rootsweb.ancestry.com/~orlane/history/histwalk.htm
I am not sure what you mean by the second question.
As far as the first, some people with Alzheimer's or the like have spotty memory problems or "fade in fade out" problems. She might have even had a stroke during her trip that caused the memory loss, so the first part of the trip she was "fine". A relative couldn't remember his wife, but he remembered how to play an instrument. Some people at the home couldn't remember how to eat properly, but they would remember a TV show. So maybe she just has no problems using the bus system.