Tom,
That's really the germane issue, isn't it?
While I have a "completist" curiosity that has me interested in who is responsible for that first nine, the relevance is wholly dependent on how much, if any, of that course was used in the excellent course that's there today.
A good example is Wyoming Valley CC. While I was intellectually curious to learn that Tom Bendelow designed the first nine on the site in 1896, other than a hole corridor or two the later 18 hole course that Tillinghast designed used virtually none of it. So, in my personal history of that course, I note Bendelow's work, yet am also fully aware that to credit any of the course today to Bendelow's efforts would be historically inaccurate.
In some cases, the opposite holds true. For instance, whoever was responsible for the Glen Ridge course built around 1913 has quite a number of holes that survive, at least in routed form, in today's Wille Park revised version.