I looked at a dozen or so transponders on the 99.0 sat this morning, and found one or two transponders with 19.2W (not east), one with 12.0W, some with the right 99.0, and several that didn't have any NIT at all.
Re the talk above about different receivers saying different things, yeah, it seems like some receivers don't bother trying to identify what transponder or sat they are on, some seem to use SDT info, some seem to use NIT data, some use whatever it can find.
My first couple receivers didn't do any of this stuff, but more recent receivers seem to try to identify what they are tuned to. Usually it is either wrong or has meaningless info, but sometimes it gets it right. Particularly the Dishnet sats seem to have good NIT info, so whenever I tune to a DN sat, or even when I'm moving the dish across the arc, I'll sometimes see all the DN sats pop up as I'm moving the dish, provided that I have one of their transponders set up. Like if I'm way out at 127 or something, and tell the dish to go to say Echo3, the receiver will tell me as I pass 119, 110, 91, 82, and 77, which is kind of neat.