I was very confused the first time I encountered the x.y notation because I was wondering why version 1.15 was more recent than version 1.9... but now I'm used to it, even if I still find it very stupid, and I would be as confused when seeing a version 1.9 more recent than a 1.15
Just speculating. They may be treating versions like decimal fractions. Thus, 7.16 < 7.2. But I can't say that this is the best place to use that concept.
Same as wow. It makes more sense like this. Maybe the issue is that some interpret what look like decimal numbers but are not decimal numbers as decimal numbers.