Hello Forrest,
I'll try my best to answer your concern. I know Pleco quite well, but for the Repetition-spaced / spaced repetition features, I'm only relying on the manual and my own good sense. If I read the following in the manual:
"Score: A measurement of how well you’ve learned a card. Pleco uses these scores to determine how often to show you each card; cards which you remember well will show up less often than cards that you have a hard time remembering, and cards that you’ve practiced a lot will show up less often than cards that you’ve just started learning. Specifically, cards with higher scores show up less often than cards with lower scores in
frequency-adjusted tests, and cards with higher scores are repeated at longer intervals in
repetition-spaced tests; by default, the number of days between card repetitions is equal to the card’s score divided by 100."
I take this to mean that you will be presented with all the cards at the beginning, and only after you have been recently tested on a card (with the
Last reviewed date that is saved with the cards set to a recent date), that is, less than the number of days the card's score divided by 100 (or 1, as I had suggested to try as an experiment) has passed since then, will Pleco temporarily refrain from showing the card to you.
Unfortunately, one can't change the
Last reviewed field for a card in the
Batch menu to simulate having just been tested on a card, so I'd suggest that you make a category of only ten cards, start a test on them, see if they are selected with your current Spaced-repetition settings, test yourself on all of them, then try a re-test on the same day and see if they will still be shown to you (they shouldn't). Would you like to try this?
In any event, I think an important takeaway from this is that if a card is classified as
Learned, that doesn't mean it will never be shown to you again. It just tells Pleco you should know it quite well, and the
Learned threshold allows Pleco to treat learned and not-yet-learned cards differently (to give you a good mix of cards you should know quite well, and new cards).