Due Date Soon emails going to users who had the learnin plan removed

Summary

Due Date Soon emails going to users who had the learnin plan removed

Content

I have a learning plan set up that has a due date of 45 days after it been assigned. There were some people that were not suppose to get this learning plan and we did not realize that until after the first email went out. I went in and removed that learning plan from the users, but they just still are receiving the email. Why is this?