This is one of the few exceptions we've had for US Highways being unsigned till their end (US-74 in TN says hi). All FDOT documents agree with the end, and so does the AASHTO. I mean, if FDOT wanted to officially shorten the route, the perfect would have been when they rerouted US-1, but they didn't. They did submit an update for US-41, but just to change the intersection part of the log do to the elimination of a small part of the US-1 multiplex.