Embedding Timeline: The Expand link below a tweet opens new tab. Why?



Sorry if my question sounds silly but I really don’t understand why the Expand link below a tweet does not expand. I did embedding of a user’s tweets on a WordPress based site. Do I miss something in customization of embedding or is it because of some settings of WordPress/Wp Theme? Please advise!

And two more questions:

1 Is it possible embedded tweets to appear by default in expanded status rather than in collapsed?
2. Is it possible to add the avatars of those who have favorited or retweeted, next to the counters, as it is on mobile apps?

Thank you!