Issue summary
Captures of Twitter profiles appear to be missing posts at the top of the capture
Explanation
Posts are hidden from the Twitter profile once you scroll past them. This means that only posts near to your scrolling position at the time of capture are present in the MHTML captures.
Workaround
Taking notes or manual captures (right click > Hunchly 2 > Capture) periodically as you scroll is labour intensive, but guarantees that all information is captured.