As one of Vuo's developers, I work on Vuo's engine (the thing that makes compositions run), work on nodes, and write documentation. You'll see me on the forums answering people's questions about Vuo.
I've been developing apps and frameworks for several years (since I was in college). Pre-Vuo projects include Kineme Quartz Composer plugins, iOS apps for education, an app that analyzes photographs of tomato slices, and software to help people with disabilities use talking keyboards.
I enjoy using Vuo to make live music visuals. My hope for Vuo is that it will grow into a community of people of diverse backgrounds and identities making lots of different artistic, useful, unique, goofy, beautiful, crafty, wonderful compositions.
@timwessman, we tried reproducing the problem here but it worked OK, so apparently there's something different about your system.
We tested running your test composition, first with Osculator and then with OSCTestApp from VIDVOX. In both cases, each click in the composition resulted in one message received by Osculator or OSCTestApp.
Your composition looks OK.
Is it possible that some other OSC device/software on your network is echoing the messages?