Where Are Nearly Half My Earnings Disappearing To?

Forgive me if this is a stupid question. I assumed it was for so long that I didn't bother to ask about it. But until some months ago, half of what I made on each article went into my Steem Power, and the other half became available to me as SBD (after the curators' cut was subtracted). The interface still indicates that's the case when I am about to post something, with the "50/50" option selected.

However for some time now, when I go to check what I earned on an article, what it tells me:

...does not match up with what the wallet tab of my profile reports, with respect to how much I actually made on that article:

As you can see, my share of the article payout should have been 28. That means I would get 14 SBD and 14 Steem Power. Instead I got 14 SBD and 2.5 Steem Power. Where did the rest of it go? It sure seems like a huge chunk of my earnings on every article is somehow vanishing into nowhere.

Am I missing something? I'd sure like there to be a sensible explanation for this that I've overlooked. Either that, or I'd like the lost earnings returned to me. One or the other.

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^{Stay Cozy!}