(long time listener, first time caller...)

I have some probes deployed, and for some period of time I was accruing credits at about the same rate per day per probe. Recently (last week or so?) I noticed that I now accrue at one rate for 1 device and a different rate for 2 other devices.

The devices have been up for at least the last 24hrs:

(unsure why the fios one bobbled...but it's still be up for ~4days)

Is this expected? or maybe I'm just in some wonky space with the accruals anyway?