Were these flights always there?

I was messing around with the Traffic Explorer tool and I noticed that a bunch of Lear 45s were flying around with "Navy" for their airline. This wouldn't have struck me as odd, except that I'd edited (and since removed) the Lear 45's aircraft.cfg to have an entry that had a Navy Lear 45. Now, I have no clue if these planes were there before or if I somehow inadvertently spawned a mess of Navy Lears running around. I currently have my plane sitting at Pensacola on August 6 2007 at 1130 and there's three of them flying around right now. Could some kind soul with some free time see if they have these flights too? There's also a pair of regular Lear 45 flights, so if I did do something, they're not all affected. I've heard "Navy" come across the ATC a few times before (once up in Iceland of all places) but just sort of assumed these were Grumman Gooses zipping around. Furthermore, if they were default "natural" flights, is there any way I can change their call sign? I'd rather not have Navy planes flying out of regular airports like they're normal traffic.