The operating system name was W2K in a CrashLog file

[Mudbill]

It might be that the implementation for getting the OS version is improperly done. Either that or it's not reporting the "version" exactly, but referring to, well what do I call it? The way it's built?

IIRC Windows 2000 was a completely different core version compared to Windows 98, as in they rewrote it from scratch. I don't think they have rewritten Windows since then, just added to it. That might have something to do with it.