In switching back and forth between points of view, I sometimes write a scene several different times. One scene in particular kept switching back and forth between point of view characters. This isn’t a bad thing; in fact, it’s an exercise many writers do on purpose.
Try writing a scene (any scene, the opening, the finale, the climax) from the point of view of a different character. What changes? What other details do you notice? What do you realize about the different characters’ motivations?
Save this new scene for reference. This exercise can help you to realize you’re writing from the wrong point of view or it can simply give you better understanding of your story.
Here’s another option: Write a memory of your own from the point of view of someone else who was there (a sibling, a bystander, a friend). What kind of insight does that give you?