First off I just want to say great job on the continuation of this firmware and maintaining it as well as you do.
The issue at hand seems to me that the QoS graphs, specifically "Bandwidth Distribution," Is displaying bandwidth total and classifications wrong. Something that I noticed was that traffic was being shaped and classified properly as reported by the detail list; just not getting rendered properly via the graph output. I don't remember this "feature" in the last version, being the 1.27 rendition, and I typically use/tweak QoS settings frequently - so i'd like to think i'd notice. Replicated on reboot; Haven't erased NVRAM because I have a lot of specific setting saved. I'm currently using your latest 1.28(beta) version:
I'm using a WRT54G-TM slightly overclocked to 216Mhz