Yeah I'm in Lake Denham and noticed this. I'm guessing, as mentioned, they realize it's less confusing since golf carts have made their way onto paths with 2 poles. I almost made that mistake when I was on a lifestyle visit.
I had another alternate theory. Unfortunately it has been pretty much proven wrong. But the path along Megisson by Lake Denham and Dabney is just as wide as the multi-modal up at Sawgrass. I heard the reason we have to go on Megisson is that Lake County (or maybe it was Leesburg) doesn't allow golf carts on "sidewalks". Therefore they couldn't make these multi-modal. My hope was that law would change for the Villages and then they could remove the 2 outside poles and have one in the center. Again many people pointed out my flawed thinking and it won't happen. But it was a nice idea.