Thanks guys for the comments. It would be interesting to see the changes in the length of the 11th hole over time.
Tom, yes it is certainly possible that the 'revamping' of the green mentioned in the article meant a change in the contouring of the green in its existing spot, however, we know that the 9th green was moved and this was also under the 'revamped' category. So who really knows what they meant by it.
Ronald, you suggested that it might have been a simple error where 17 looked like 11 and then was written as eleven. I'm not so sure that is likely. Possible of course. The info from Bob Mucks may well have been given to the reporter over the phone in which case there should have been no confusion. As 11 was shortened around this time it's certainly coherent to have the 11th green being "revamped" - whatever that means!
I wonder if there are any clues in Mac's green plan for this hole? Is there anything in it that indicates its original siting? Well to start with I do not think the club has a full set of green plans, and there are a couple that are missing so I understand. When Mac was originally drawing these plans there was obviously some doubt as to which nine would be the back and which one the front, hence the green plans are labelled '1 or 10', and '2 or 11' etc. There is a green plan for '2 or 11' but interestingly one just labelled '11th'. They do however seem to be essentially the same green, just one of them was obviously drawn later than the other, as to which one I don't know. there are slight differences between the two plans, but not enough to suggest they are for different holes.
However, the one labelled 11th has an outline of a tee to the right of the green, which is the general location of the 3rd tee relative to the 2nd green. As the 12th tee is to the left of the 11th green, I can only conclude that both these plans are actually for the green of the 2nd.
So the upshot is I think that there is no green plan for the current 11th in Pasatiempo's keeping. So no light for this particular dilemma.