Minor issue with quests on dashboard. If you add the quest via kao garden store, then remove the quests via dashboard settings, and you go back to the kao garden store, then the check mark for add quests to dashboard remains checked, which is a bit weird. However, the checkmark does clear when you do a forced reload of the page.
I had multilpe items to collected and instead of clicking collect all, I instead clicked on the individual collect buttons. After I clicked the second to last one, the Collect All kao coin amount changed to NaN. Refreshing the page fixed this, so it is only a temporary thing when the page calculates the coins to collect across all items on the fly.
I tried running through what you did a few times, but have not yet been able to replicate it. Was this on the garden page, or on the dashboard? Did you clean up some Today quests before moving to This week? (trying to think of some variation that might cause the issue).
I finished all my schedules, then went directly to the garden page (from the dashboard). I am sorting the tasks by progress (i.e. collected first).
I now went directly to the weekly tab as I had 3 items to collect there today:
After I collected the first, all was good. But the moment I collected the second it turned into this:
As you can see, the first two items that were ready to be collected are gone, but the third one [answer vocabulary questions correctly] was now duplicated and the collect all changed to NaN.
After accepting the last collect and refreshing the page, the weekly section now looks like this:
None of the tasks I could collect today were 100% done for the week, so I guess having an item not 100% done after collection might not be the sole reason for the issue - maybe it is the ordering at the same time?