Thank you for your kind and detail answer @AaronMSpelling 🙂
one thing still I have issue is following:
7 days later I fixed the feed, still I could reach to the deleted program on the [continue watching] category. However I can't find them through the search menu.
one more thing I tried is removing [continue watching] category. So there's no way to get reach to the programs. And then, I add [continue watching] category back. Unfortunately, the programs should've been deleted were showed up again.
Here's my guess that there's a problem with syncing updated feed on the [continue watching] category.
Do you have any information of this issue?