Glendale Freeway Loses Fake I-2 Sign

Before. And after. Same location. Same freeway. Two different designations. Three months ago I noticed an odd sign. The "before" sign on the left - along southbound Riverside Drive near Atwater Village - pointed to California state highway 2 (Glendale Freeway). But it used the red, white and blue shield of a federal highway, Interstate 2. One problem: Interstate 2 doesn't exist. The federal highway system has no I-2. So I contacted City Council. They seemed to think the Glendale Freeway was, in fact, I-2, but added, "It is also the jurisdiction of Caltrans, so any questions you have about the 2 can be directed to them." Caltrans replied, essentially, WTF? "The 2 is SR-2. If possible, can you please email us a picture and the location of the sign that says I-2." I did. Three months go by. This morning I drive down Riverside. There's a new sign, the "after" sign on the right. It probably went up within the last week, because I drive that way every couple of days and check it. Obsessively, one might say. Now the sign includes the correct green and white hut designating a state highway, California SR-2. So it's fixed. But not explained. How did the Glendale Freeway get promoted - then demoted? Was it a Richard Ankrom stunt? A bureaucratic snafu? Or just wishful thinking tied to federal highway funds?