Hi @CarlThelen,
I do not have any exact answer for you but I do have a recommendation.
If an assignment was deleted and the assignment group that they were associated with before being deleted no longer exists, the assignment is "lost" when restored and does not appear in the "Assignments" area.
Go into the "Grades" area of the course and if there is a column for the assignment that was restored. If there is, click on the name of the assignment and the assignment should appear. Go into "Edit" mode for the assignment and change it to a different "Assignment Group" as described in the "Select Assignment Group" section of the How do I add or edit details in an assignment? - Instructure Community - 971 support article.
I hope that helps.
-Doug