I think I see what’s going on. Let me see if I can fix it.
Check out the latest beta and let me know if this fixes the problem for you.
As it turns out, some of your table lines were terminated by a pair or more of spaces, which are typically used in Markdown to indicate a line break. Notenik was dutifully inserting these, but line breaks within a table are not valid, and so they were sort of “floating” to the top, above the table, when the HTML was being parsed for display within a browser window.
This beta version suppresses line breaks for table lines, since they aren’t allowed there anyway.