Twitter is not a static media. And they have changed it so that if you click on someone's tweet to isolate the tweet you are brought to their twitter feed so that means you then have to go back to your original twitter feed and wait for the next batch of tweets which may or may not have the tweet you saw and isolated.

So, things pop up on twitter at odd and sometimes inopportune times. If you decide to bring them to this thread, many complain it interferes with "the flow", however, later others pick up the tweets and bring important information forward as they delve into them.

It's tough to know what to do as unfortunately, twitter disappears tweets that it find unpalatable and you have to grab em when you see em.