Uh huh! Why is my Spidey Sense making the hairs on the back of my neck stand up?
Perhaps a FOIA request for a copy of the contract for the new signs, rather than waiting to find out when they actually put them up? Nothing lilke making them prove they actually took corrective action before your conversation with them.
And I am flat out going to refuse to ask why they did not take any temporary measures to cover up the no-longer applicable portion of the sign. Nope! Just not gonna do that!