But do you mean for Earning Stake Time to be programmatically made non-spendable? That would also require a change in the current functionality, not only a change in what Stats are being displayed and how they are being displayed.
I wasn't aware that coins earning stake time were programmatically spendable, I thought they were considered as part of the staked count currently.
My thoughts are a coin should only ever be in one of three stages - resting (Spendable), working (Earning stake time and/or staking) or awaiting confirmation before being put back into a working state (Interest and Unconfirmed).
Yeah, the point is - right now those under the label Spendable are the ones working. While there, you can also spend them.
Once they find a block, they go to "Staking" - if you hover over the label you will see the more precise description : "Total of coins that was staked..."
And also by the way the process goes - it is obvious that since in a new wallet you only have Spendable coins - apparently those are the ones working. Otherwise you wouldn't be able to find a block. Then once a portion of the coins finds a block, they get staked, and can't work anymore until the 500 confirmations after finding that block are done. And then once all Spendable are gone (unless you have set a Reserve) - your wallet does not find more blocks, until some of the staked eventually gets back to Spendable after 500 confirms.