How the heck does Barnes have such a short standing reach while measuring out at 6'7 in barefeet with a 6'11.25 wingspan. Going through the draftexpress measurement database, guys with similar height and wingspan have standing reaches in the 8'8 to 9 feet range. Barnes does have a long neck and oblong head but it's not so freakish that his standing reach should be 2.5 to 5 inches shorter than similarly proportioned peers.
If Barnes tanked his standing reach, although I can't see how he managed to get away with so much, that really helps his vertical measurements. For instance, Josh Smith measured out very smilarly to Harrison: 6'7, 7 wingspan, but his standing reach was 9 feet. With that big standing reach, the 11'7 he reached in a standing jump put his standing vertical at 32.5 inches. Barnes also touched 11'7 but that put his standing reach at a very impressive 38 inches. It doesn't pass the smell test.