There are a currently number of errors on the AW site for rivers in Colorado, which is presumably the 'Mountainbuzz' flows referred to. My impression (... not based on any real knowledge ...) is that many current issues were introduced with relatively recent revisions/updating to the underlying web site code. As you note errors, it would be very helpful to report these to the webmaster, clearly describing what's wrong and what's needed to fix it. I understand AW is working hard to fix things that were broken (some in rather perplexing ways), improve info, and generally keep the site functioning.
AW is relatively small organization that relies on our input. There really isn't a "they" that is responsible - it's our resource and the quality and currency of information will reflect what we do or don't contribute to it.
To add to the confusion, in some cases the older Colorado guide (CRC) and the new one (WWSR) refer to different gauges for the same run. An example is Gilman gorge, where one guide references the gauge at the top (noting that you need to add in Homestake Cr) and the other a lower gauge. So as noted above, at least in Colorado, web site users still need to carefully read the guides and flow details to be sure what they're getting.
As an aside, I think AW has done a very impressive job with their web site. It seems like it's increasingly difficult to track and comply with evolving web standards, maintain info and links to outside data sources, and deal with the plethora of security issues. They deserve our support.