Warbirds directory lists the aircraft (N86EB) as being on display at Seymour Johnson AFB in Goldsboro, NC. But it also says the same aircraft is reported to be on display at Channel Islands ANGB, Oxnard, CA as USAF 91046. Just as you said. The F-86 site
http://f-86.tripod.com/usa1.html also notes the dual identity problem, but seems to have some evidence that the Seymour Johnson bird is the real 23238. Maybe you could query them to find out what their reasoning is.
Cheers,
Richard