Two goals up, then two goals conceded…and an Everton penalty in the last of six added minutes which referee Andy Madley overturned after reviewing the video.
United then levelled after another Fernandes free-kick bounced out to Manuel Ugarate, who took a touch on the edge of the box before firing the ball brilliantly into the bottom corner.
But Amorim's side almost threw away a point after referee Andy Madley pointed to the spot after Ashley Young went down in the area.
Abdoulaye Doucoure doubled the hosts' lead after heading in a rebound from a Jack Harrison effort, and Everton threatened to add more.
Shortly after half-time Doucoure had an effort well saved by Andre Onana, as United appeared to be sleepwalking to full-time.
