Continuity mistake: When Edward is showing Bella the bruises on her arm and shoulder, his wedding ring is on his right hand. They are looking in a mirror, but the camera is on Edward, not the reflection.
Continuity mistake: When Bella is first seen pregnant, she is wearing grey pants, a blue shirt and navy jacket, Edward is wearing a brown shirt, and Carlisle is wearing a blue mock turtleneck. On what is supposed to be the next day (and after having seen them wearing different clothing), all three are wearing the same clothes again while in the library/makeshift hospital room. They are discussing a cracked rib that was causing Bella pain the day before. These scenes were obviously meant to be back-to-back, but were rearranged in editing.
Continuity mistake: After Renesmee's birth, there are two smudges of blood on Edward's right cheek. While Edward works to transform Bella, the blood spots appear and disappear between shots.
Continuity mistake: At the end, just after Renesmee's birth, the blood pattern on the front of Edward's blue shirt changes within minutes from being one solid red mass to more mottled.
Answer: Imprinting is an involuntary mechanism. The shape-shifter can't voluntarily imprint on anybody. Jacob tried to imprint on Bella but was unable to do so and began going around looking for other girls to imprint on but, is unable to do it of his own free will.
On the flip side, Sam Ulee was in love with Leah Clearwater, but then he involuntarily imprinted on Emily, dumping Leah and breaking her heart.
raywest ★