Hi @markleungLC 
Thanks so much for taking the time to record these videos. Both are super helpful!!
For the first problem, it appears to be a bug on our side. I’ve informed the tech team so that they can look into it.
For the second problem, links to static collection pages don’t work when the data is filtered because we use the id in the unfiltered Collection to create the page.
It’s something the team is aware of and looking to improve but it hasn’t been prioritized yet.
You can upvote the feature request on our public roadmap to help us prioritize it in the future.
In the meantime, this thread explains a workaround you can use.