Atwell got wound up when Ipswitch started wasted time, crowd got agitated and he didn't know how to deal with it. The goal that was disallowed when Sammie was in the eye of the keeper, which TV replays show was incorrect, was disallowed quite a while after ball his the net. This suggests the linesman had some doubt so why didn't Atwell go over to have a chat with him? Probably because he was wound up and couldn't focus.
We've witnessed a poor ref. Yet he a rising star and we'll see more of him officiating top games. Like in all jobs he'll learn from his mistakes.