Some more confusions about voting and comment

When using "I want this" instead of simple arrow, it will not show the voting count, and the be-lit-on button will return to grey after refreshing, is this an expected behavior? Why?
When adding comment, the comment itself will automatically has one upvote, is this an expected behavior? Why?
When deleting a comment, the comment will be marked as deleted and still be shown at its original place, and there's no way to completely remove/clear it, is this an expected behavior? Why?
There's no cancel button when editing a comment, I think the simple way could be clicking any blank area to exit editing mode without saving it.

I found clearflask is powerful but really needs more documents to explain its design, especially for these puzzling things, thanks.