Thank you for bringing this to our attention. We'll definitely look into it. Tracking this internally as FB85749.
FYI, I was doing some research and it might be that the counters which are labeled "per second" are not really per second at all, and are truly cumulative counters.
This would mean that your counters are configured properly in the templates, but I'm sure you can see the confusion. If true, perhaps a SQL comment in the template should be added so that this confusion does not resurface. Up to you to draw your own conclusion of course.
Either way the SQL comment about the "page reads per second" would need to be changed in each "per second" monitor, since they all say this.