I've had a look at your decay configuration and I can tell you that the decay rate is displaying properly.
Given your settings:
* 45 Days Full Points
* 30% decay floor
* 1 Day Decay Timeframe
This means that your points will be static for 45 days (full points), and then over the course of a single day (or for most cases, it'll be instant, since decay is calculated daily), any points earned or spent will immediately decay to 30%.
First, I must ask, is this by design? Or did you want decay to be a more gradual process?
Second, the decay rate column is based on the instantaneous difference of decay on any given day. So on a day where decay will happen for an individual, you may see a number show in the decay rate column. But because of your configuration, and decay being, for all practical purposes, instant, there isn't usually going to be a decay rate (except as said before on a day where the decay will be hitting for that particular individual).
A decay rate implies a gradual change, with the current decay representing the change on that particular day, whereas in your case, it's simply instant.
Typically, decay is set to decay over a longer timeframe, and when this is the case, decay will actually have a value that shows.
Which is why I asked if this configuration is intentional.
I wanted more of a gradual process. The decay its self is working. It dropped down. IS it because its set for 1 day vers like 7 days that the decay rate doesn't show?