Yes, Texas DMV is in a form that is hard for most people to understand, but the current information on that page is wrong. No offence, but I feel like this is political correctness being prioritized over accurate information.
Let me ask you, when you are reporting, whether you would choose an official source with inaccurate information, or a reliable source with accurate information? In this case, you know that the official source is inaccurate. Greyhound's fleet page is almost always inaccurate, and that one is from May 2014. And I highly doubt any trade magazine will release info on Greyhound fleet cuts.
Perhaps a compromise would be put in a note that the fleet information is from May 2014, and that, according to Texas DMV, the information is no longer accurate, but Greyhound hasn't updated their official website yet.